{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2025-12-14T01:33:56.000Z","description":"Problems submitted by members of the MATLAB Central community.","is_default":true,"created_by":161519,"badge_id":null,"featured":false,"trending":false,"solution_count_in_trending_period":0,"trending_last_calculated":"2025-12-14T00:00:00.000Z","image_id":null,"published":true,"community_created":false,"status_id":2,"is_default_group_for_player":false,"deleted_by":null,"deleted_at":null,"restored_by":null,"restored_at":null,"description_opc":null,"description_html":null,"published_at":null},"problems":[{"id":2413,"title":"Temperature Conversion Utility","description":"There are a few problems on Cody regarding temperature conversion (C to K, C to F, F to C), but none include Rankine. Furthermore, they each involve simple one-liner solutions. For this problem, you are to write a utility function that takes a given temperature and two capital letters designating which temperature scale is being converted to which. For example, T_convertor(100,'C','F') requires 100 degrees Celsius be converted to Fahrenheit.\r\n\r\nThe test suite includes all 16 possible combinations: C to F, C to R, C to C, C to K, K to F, K to R, etc. (Yes, the redundant combinations are included.)\r\n\r\nFor reference, temperature conversion formulas are available at \u003chttp://en.wikipedia.org/wiki/Temperature_conversion\u003e.\r\n\r\nA follow-on problem (more difficult with string inputs) is located here: \u003chttp://www.mathworks.com/matlabcentral/cody/problems/2415-temperature-conversion-utility-strings\u003e.","description_html":"\u003cp\u003eThere are a few problems on Cody regarding temperature conversion (C to K, C to F, F to C), but none include Rankine. Furthermore, they each involve simple one-liner solutions. For this problem, you are to write a utility function that takes a given temperature and two capital letters designating which temperature scale is being converted to which. For example, T_convertor(100,'C','F') requires 100 degrees Celsius be converted to Fahrenheit.\u003c/p\u003e\u003cp\u003eThe test suite includes all 16 possible combinations: C to F, C to R, C to C, C to K, K to F, K to R, etc. (Yes, the redundant combinations are included.)\u003c/p\u003e\u003cp\u003eFor reference, temperature conversion formulas are available at \u003ca href = \"http://en.wikipedia.org/wiki/Temperature_conversion\"\u003ehttp://en.wikipedia.org/wiki/Temperature_conversion\u003c/a\u003e.\u003c/p\u003e\u003cp\u003eA follow-on problem (more difficult with string inputs) is located here: \u003ca href = \"http://www.mathworks.com/matlabcentral/cody/problems/2415-temperature-conversion-utility-strings\"\u003ehttp://www.mathworks.com/matlabcentral/cody/problems/2415-temperature-conversion-utility-strings\u003c/a\u003e.\u003c/p\u003e","function_template":"function T_out = T_convertor(T,u1,u2)\r\n T_out = T;\r\nend","test_suite":"%%\r\nT = 100;\r\nu1 = 'C';\r\nu2 = 'F';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-212) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'C';\r\nu2 = 'R';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-671.67) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'C';\r\nu2 = 'C';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-100) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'C';\r\nu2 = 'K';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-373.15) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'K';\r\nu2 = 'F';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-(-279.67)) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'K';\r\nu2 = 'R';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-180) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'K';\r\nu2 = 'C';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-(-173.15)) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'K';\r\nu2 = 'K';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-100) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'F';\r\nu2 = 'F';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-100) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'F';\r\nu2 = 'R';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-559.67) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'F';\r\nu2 = 'C';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-37.7777778) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'F';\r\nu2 = 'K';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-310.9277778) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'R';\r\nu2 = 'F';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-(-359.67)) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'R';\r\nu2 = 'R';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-100) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'R';\r\nu2 = 'C';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-(-217.5944444)) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'R';\r\nu2 = 'K';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-55.5555556) \u003c eps)\r\n","published":true,"deleted":false,"likes_count":3,"comments_count":0,"created_by":26769,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":50,"test_suite_updated_at":"2014-07-11T12:34:03.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2014-07-11T12:30:22.000Z","updated_at":"2026-04-03T03:09:06.000Z","published_at":"2014-07-11T12:34:03.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"targetMode\":\"\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"targetMode\":\"\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThere are a few problems on Cody regarding temperature conversion (C to K, C to F, F to C), but none include Rankine. Furthermore, they each involve simple one-liner solutions. For this problem, you are to write a utility function that takes a given temperature and two capital letters designating which temperature scale is being converted to which. For example, T_convertor(100,'C','F') requires 100 degrees Celsius be converted to Fahrenheit.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThe test suite includes all 16 possible combinations: C to F, C to R, C to C, C to K, K to F, K to R, etc. (Yes, the redundant combinations are included.)\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eFor reference, temperature conversion formulas are available at\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://en.wikipedia.org/wiki/Temperature_conversion\\\"\u003e\u003cw:r\u003e\u003cw:t\u003ehttp://en.wikipedia.org/wiki/Temperature_conversion\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eA follow-on problem (more difficult with string inputs) is located here:\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://www.mathworks.com/matlabcentral/cody/problems/2415-temperature-conversion-utility-strings\\\"\u003e\u003cw:r\u003e\u003cw:t\u003ehttp://www.mathworks.com/matlabcentral/cody/problems/2415-temperature-conversion-utility-strings\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"},{"id":2415,"title":"Temperature Conversion Utility (Strings)","description":"This is a follow-on problem to \u003chttp://www.mathworks.com/matlabcentral/cody/problems/2413-temperature-conversion-utility Problem 2413: Temperature Conversion Utility\u003e.\r\n\r\nYou are provided a cell array of strings that contains the source temperature and units (in various formats) and a separate cell array of strings that contains the target temperature units (in various formats). Produce a numerical vector of converted temperature values. \r\n\r\nExample:\r\n\r\n T_in  = {'100 Celsius', '50degF', '90K', strcat('111',char(176),'R')};  \r\n T_to  = {'R','C','degF','kelvin'}; \r\n T_out = [671.67 10 -297.67 61.6666667];\r\n\r\nFor reference, temperature conversion formulas are available on \u003chttp://en.wikipedia.org/wiki/Temperature_conversion Wikipedia\u003e.","description_html":"\u003cp\u003eThis is a follow-on problem to \u003ca href = \"http://www.mathworks.com/matlabcentral/cody/problems/2413-temperature-conversion-utility\"\u003eProblem 2413: Temperature Conversion Utility\u003c/a\u003e.\u003c/p\u003e\u003cp\u003eYou are provided a cell array of strings that contains the source temperature and units (in various formats) and a separate cell array of strings that contains the target temperature units (in various formats). Produce a numerical vector of converted temperature values.\u003c/p\u003e\u003cp\u003eExample:\u003c/p\u003e\u003cpre\u003e T_in  = {'100 Celsius', '50degF', '90K', strcat('111',char(176),'R')};  \r\n T_to  = {'R','C','degF','kelvin'}; \r\n T_out = [671.67 10 -297.67 61.6666667];\u003c/pre\u003e\u003cp\u003eFor reference, temperature conversion formulas are available on \u003ca href = \"http://en.wikipedia.org/wiki/Temperature_conversion\"\u003eWikipedia\u003c/a\u003e.\u003c/p\u003e","function_template":"function [T_out] = T_convertor_str(T_in,T_to)\r\n T_out = 1;\r\nend","test_suite":"%%\r\nT_in = {'100 Celsius', '50degF', '90K', strcat('111',char(176),'R')};\r\nT_to = {'R','C','degF','kelvin'};\r\nT_out = [671.67 10 -297.67 61.6666667];\r\neps = 1e-3;\r\nassert(sum(abs(T_convertor_str(T_in,T_to)-T_out)) \u003c eps)\r\n\r\n%%\r\nT_in = {'10C','20degC','30 Celsius','40 Centigrade',strcat('50',char(176),'C'),'60K','70 kelvin','80 FAHRENHEIT'};\r\nT_to = {'R','R','Rankine','deg R','R','R',strcat(char(176),'R'),'degR'};\r\nT_out = [509.67 527.67 545.67 563.67 581.67 108 126 539.67];\r\neps = 1e-3;\r\nassert(sum(abs(T_convertor_str(T_in,T_to)-T_out)) \u003c eps)\r\n\r\n%%\r\nT_in = {'100 DEGREES RANKINE','100degC','100K','100F','1000R','1000 centigrade','1000 deg F','1000 kelvin'};\r\nT_to = {'C','degC',strcat(char(176),'C'),'Celsius','centigrade','deg C','degrees Celsius','CENTIGRADE'};\r\nT_out = [-217.5944444 100 -173.15 37.7777778 282.4055556 1000 537.7777778 726.85];\r\neps = 1e-3;\r\nassert(sum(abs(T_convertor_str(T_in,T_to)-T_out)) \u003c eps)\r\n","published":true,"deleted":false,"likes_count":2,"comments_count":0,"created_by":26769,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":29,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2014-07-11T18:21:42.000Z","updated_at":"2026-04-03T03:10:48.000Z","published_at":"2014-07-11T18:21:42.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"targetMode\":\"\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"targetMode\":\"\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThis is a follow-on problem to\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://www.mathworks.com/matlabcentral/cody/problems/2413-temperature-conversion-utility\\\"\u003e\u003cw:r\u003e\u003cw:t\u003eProblem 2413: Temperature Conversion Utility\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eYou are provided a cell array of strings that contains the source temperature and units (in various formats) and a separate cell array of strings that contains the target temperature units (in various formats). Produce a numerical vector of converted temperature values.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eExample:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[ T_in  = {'100 Celsius', '50degF', '90K', strcat('111',char(176),'R')};  \\n T_to  = {'R','C','degF','kelvin'}; \\n T_out = [671.67 10 -297.67 61.6666667];]]\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eFor reference, temperature conversion formulas are available on\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://en.wikipedia.org/wiki/Temperature_conversion\\\"\u003e\u003cw:r\u003e\u003cw:t\u003eWikipedia\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"}],"problem_search":{"errors":[],"problems":[{"id":2413,"title":"Temperature Conversion Utility","description":"There are a few problems on Cody regarding temperature conversion (C to K, C to F, F to C), but none include Rankine. Furthermore, they each involve simple one-liner solutions. For this problem, you are to write a utility function that takes a given temperature and two capital letters designating which temperature scale is being converted to which. For example, T_convertor(100,'C','F') requires 100 degrees Celsius be converted to Fahrenheit.\r\n\r\nThe test suite includes all 16 possible combinations: C to F, C to R, C to C, C to K, K to F, K to R, etc. (Yes, the redundant combinations are included.)\r\n\r\nFor reference, temperature conversion formulas are available at \u003chttp://en.wikipedia.org/wiki/Temperature_conversion\u003e.\r\n\r\nA follow-on problem (more difficult with string inputs) is located here: \u003chttp://www.mathworks.com/matlabcentral/cody/problems/2415-temperature-conversion-utility-strings\u003e.","description_html":"\u003cp\u003eThere are a few problems on Cody regarding temperature conversion (C to K, C to F, F to C), but none include Rankine. Furthermore, they each involve simple one-liner solutions. For this problem, you are to write a utility function that takes a given temperature and two capital letters designating which temperature scale is being converted to which. For example, T_convertor(100,'C','F') requires 100 degrees Celsius be converted to Fahrenheit.\u003c/p\u003e\u003cp\u003eThe test suite includes all 16 possible combinations: C to F, C to R, C to C, C to K, K to F, K to R, etc. (Yes, the redundant combinations are included.)\u003c/p\u003e\u003cp\u003eFor reference, temperature conversion formulas are available at \u003ca href = \"http://en.wikipedia.org/wiki/Temperature_conversion\"\u003ehttp://en.wikipedia.org/wiki/Temperature_conversion\u003c/a\u003e.\u003c/p\u003e\u003cp\u003eA follow-on problem (more difficult with string inputs) is located here: \u003ca href = \"http://www.mathworks.com/matlabcentral/cody/problems/2415-temperature-conversion-utility-strings\"\u003ehttp://www.mathworks.com/matlabcentral/cody/problems/2415-temperature-conversion-utility-strings\u003c/a\u003e.\u003c/p\u003e","function_template":"function T_out = T_convertor(T,u1,u2)\r\n T_out = T;\r\nend","test_suite":"%%\r\nT = 100;\r\nu1 = 'C';\r\nu2 = 'F';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-212) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'C';\r\nu2 = 'R';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-671.67) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'C';\r\nu2 = 'C';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-100) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'C';\r\nu2 = 'K';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-373.15) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'K';\r\nu2 = 'F';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-(-279.67)) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'K';\r\nu2 = 'R';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-180) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'K';\r\nu2 = 'C';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-(-173.15)) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'K';\r\nu2 = 'K';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-100) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'F';\r\nu2 = 'F';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-100) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'F';\r\nu2 = 'R';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-559.67) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'F';\r\nu2 = 'C';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-37.7777778) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'F';\r\nu2 = 'K';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-310.9277778) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'R';\r\nu2 = 'F';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-(-359.67)) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'R';\r\nu2 = 'R';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-100) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'R';\r\nu2 = 'C';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-(-217.5944444)) \u003c eps)\r\n\r\n%%\r\nT = 100;\r\nu1 = 'R';\r\nu2 = 'K';\r\neps = 1e-4;\r\nassert(abs(T_convertor(T,u1,u2)-55.5555556) \u003c eps)\r\n","published":true,"deleted":false,"likes_count":3,"comments_count":0,"created_by":26769,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":50,"test_suite_updated_at":"2014-07-11T12:34:03.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2014-07-11T12:30:22.000Z","updated_at":"2026-04-03T03:09:06.000Z","published_at":"2014-07-11T12:34:03.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"targetMode\":\"\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"targetMode\":\"\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThere are a few problems on Cody regarding temperature conversion (C to K, C to F, F to C), but none include Rankine. Furthermore, they each involve simple one-liner solutions. For this problem, you are to write a utility function that takes a given temperature and two capital letters designating which temperature scale is being converted to which. For example, T_convertor(100,'C','F') requires 100 degrees Celsius be converted to Fahrenheit.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThe test suite includes all 16 possible combinations: C to F, C to R, C to C, C to K, K to F, K to R, etc. (Yes, the redundant combinations are included.)\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eFor reference, temperature conversion formulas are available at\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://en.wikipedia.org/wiki/Temperature_conversion\\\"\u003e\u003cw:r\u003e\u003cw:t\u003ehttp://en.wikipedia.org/wiki/Temperature_conversion\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eA follow-on problem (more difficult with string inputs) is located here:\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://www.mathworks.com/matlabcentral/cody/problems/2415-temperature-conversion-utility-strings\\\"\u003e\u003cw:r\u003e\u003cw:t\u003ehttp://www.mathworks.com/matlabcentral/cody/problems/2415-temperature-conversion-utility-strings\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"},{"id":2415,"title":"Temperature Conversion Utility (Strings)","description":"This is a follow-on problem to \u003chttp://www.mathworks.com/matlabcentral/cody/problems/2413-temperature-conversion-utility Problem 2413: Temperature Conversion Utility\u003e.\r\n\r\nYou are provided a cell array of strings that contains the source temperature and units (in various formats) and a separate cell array of strings that contains the target temperature units (in various formats). Produce a numerical vector of converted temperature values. \r\n\r\nExample:\r\n\r\n T_in  = {'100 Celsius', '50degF', '90K', strcat('111',char(176),'R')};  \r\n T_to  = {'R','C','degF','kelvin'}; \r\n T_out = [671.67 10 -297.67 61.6666667];\r\n\r\nFor reference, temperature conversion formulas are available on \u003chttp://en.wikipedia.org/wiki/Temperature_conversion Wikipedia\u003e.","description_html":"\u003cp\u003eThis is a follow-on problem to \u003ca href = \"http://www.mathworks.com/matlabcentral/cody/problems/2413-temperature-conversion-utility\"\u003eProblem 2413: Temperature Conversion Utility\u003c/a\u003e.\u003c/p\u003e\u003cp\u003eYou are provided a cell array of strings that contains the source temperature and units (in various formats) and a separate cell array of strings that contains the target temperature units (in various formats). Produce a numerical vector of converted temperature values.\u003c/p\u003e\u003cp\u003eExample:\u003c/p\u003e\u003cpre\u003e T_in  = {'100 Celsius', '50degF', '90K', strcat('111',char(176),'R')};  \r\n T_to  = {'R','C','degF','kelvin'}; \r\n T_out = [671.67 10 -297.67 61.6666667];\u003c/pre\u003e\u003cp\u003eFor reference, temperature conversion formulas are available on \u003ca href = \"http://en.wikipedia.org/wiki/Temperature_conversion\"\u003eWikipedia\u003c/a\u003e.\u003c/p\u003e","function_template":"function [T_out] = T_convertor_str(T_in,T_to)\r\n T_out = 1;\r\nend","test_suite":"%%\r\nT_in = {'100 Celsius', '50degF', '90K', strcat('111',char(176),'R')};\r\nT_to = {'R','C','degF','kelvin'};\r\nT_out = [671.67 10 -297.67 61.6666667];\r\neps = 1e-3;\r\nassert(sum(abs(T_convertor_str(T_in,T_to)-T_out)) \u003c eps)\r\n\r\n%%\r\nT_in = {'10C','20degC','30 Celsius','40 Centigrade',strcat('50',char(176),'C'),'60K','70 kelvin','80 FAHRENHEIT'};\r\nT_to = {'R','R','Rankine','deg R','R','R',strcat(char(176),'R'),'degR'};\r\nT_out = [509.67 527.67 545.67 563.67 581.67 108 126 539.67];\r\neps = 1e-3;\r\nassert(sum(abs(T_convertor_str(T_in,T_to)-T_out)) \u003c eps)\r\n\r\n%%\r\nT_in = {'100 DEGREES RANKINE','100degC','100K','100F','1000R','1000 centigrade','1000 deg F','1000 kelvin'};\r\nT_to = {'C','degC',strcat(char(176),'C'),'Celsius','centigrade','deg C','degrees Celsius','CENTIGRADE'};\r\nT_out = [-217.5944444 100 -173.15 37.7777778 282.4055556 1000 537.7777778 726.85];\r\neps = 1e-3;\r\nassert(sum(abs(T_convertor_str(T_in,T_to)-T_out)) \u003c eps)\r\n","published":true,"deleted":false,"likes_count":2,"comments_count":0,"created_by":26769,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":29,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2014-07-11T18:21:42.000Z","updated_at":"2026-04-03T03:10:48.000Z","published_at":"2014-07-11T18:21:42.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"targetMode\":\"\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"targetMode\":\"\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThis is a follow-on problem to\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://www.mathworks.com/matlabcentral/cody/problems/2413-temperature-conversion-utility\\\"\u003e\u003cw:r\u003e\u003cw:t\u003eProblem 2413: Temperature Conversion Utility\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eYou are provided a cell array of strings that contains the source temperature and units (in various formats) and a separate cell array of strings that contains the target temperature units (in various formats). Produce a numerical vector of converted temperature values.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eExample:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[ T_in  = {'100 Celsius', '50degF', '90K', strcat('111',char(176),'R')};  \\n T_to  = {'R','C','degF','kelvin'}; \\n T_out = [671.67 10 -297.67 61.6666667];]]\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eFor reference, temperature conversion formulas are available on\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"http://en.wikipedia.org/wiki/Temperature_conversion\\\"\u003e\u003cw:r\u003e\u003cw:t\u003eWikipedia\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"}],"term":"tag:\"utility\"","current_player_id":null,"fields":[{"name":"page","type":"integer","callback":null,"default":1,"directive":null,"facet":null,"facet_method":"and","operator":null,"param":null,"static":null,"prepend":true},{"name":"per_page","type":"integer","callback":null,"default":50,"directive":null,"facet":null,"facet_method":"and","operator":null,"param":null,"static":null,"prepend":true},{"name":"sort","type":"string","callback":null,"default":null,"directive":null,"facet":null,"facet_method":"and","operator":null,"param":null,"static":null,"prepend":true},{"name":"body","type":"text","callback":null,"default":"*:*","directive":null,"facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":false},{"name":"group","type":"string","callback":null,"default":null,"directive":"group","facet":true,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"difficulty_rating_bin","type":"string","callback":null,"default":null,"directive":"difficulty_rating_bin","facet":true,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"id","type":"integer","callback":null,"default":null,"directive":"id","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"tag","type":"string","callback":null,"default":null,"directive":"tag","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"product","type":"string","callback":null,"default":null,"directive":"product","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"created_at","type":"timeframe","callback":{},"default":null,"directive":"created_at","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"profile_id","type":"integer","callback":null,"default":null,"directive":"author_id","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"created_by","type":"string","callback":null,"default":null,"directive":"author","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"player_id","type":"integer","callback":null,"default":null,"directive":"solver_id","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"player","type":"string","callback":null,"default":null,"directive":"solver","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"solvers_count","type":"integer","callback":null,"default":null,"directive":"solvers_count","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"comments_count","type":"integer","callback":null,"default":null,"directive":"comments_count","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"likes_count","type":"integer","callback":null,"default":null,"directive":"likes_count","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"leader_id","type":"integer","callback":null,"default":null,"directive":"leader_id","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"leading_solution","type":"integer","callback":null,"default":null,"directive":"leading_solution","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true}],"filters":[{"name":"asset_type","type":"string","callback":null,"default":null,"directive":null,"facet":null,"facet_method":"and","operator":null,"param":null,"static":"\"cody:problem\"","prepend":true},{"name":"profile_id","type":"integer","callback":{},"default":null,"directive":null,"facet":null,"facet_method":"and","operator":null,"param":"author_id","static":null,"prepend":true}],"query":{"params":{"per_page":50,"term":"tag:\"utility\"","current_player":null,"sort":"map(difficulty_value,0,0,999) asc"},"parser":"MathWorks::Search::Solr::QueryParser","directives":{"term":{"directives":{"tag":[["tag:\"utility\"","","\"","utility","\""]]}}},"facets":{"#\u003cMathWorks::Search::Field:0x00007f4a00c5da40\u003e":null,"#\u003cMathWorks::Search::Field:0x00007f4a00c5d9a0\u003e":null},"filters":{"#\u003cMathWorks::Search::Field:0x00007f4a00c5d0e0\u003e":"\"cody:problem\""},"fields":{"#\u003cMathWorks::Search::Field:0x00007f4a00c5dcc0\u003e":1,"#\u003cMathWorks::Search::Field:0x00007f4a00c5dc20\u003e":50,"#\u003cMathWorks::Search::Field:0x00007f4a00c5db80\u003e":"map(difficulty_value,0,0,999) asc","#\u003cMathWorks::Search::Field:0x00007f4a00c5dae0\u003e":"tag:\"utility\""},"user_query":{"#\u003cMathWorks::Search::Field:0x00007f4a00c5dae0\u003e":"tag:\"utility\""},"queried_facets":{}},"query_backend":{"connection":{"configuration":{"index_url":"http://index-op-v2/solr/","query_url":"http://search-op-v2/solr/","direct_access_index_urls":["http://index-op-v2/solr/"],"direct_access_query_urls":["http://search-op-v2/solr/"],"timeout":10,"vhost":"search","exchange":"search.topic","heartbeat":30,"pre_index_mode":false,"host":"rabbitmq-eks","port":5672,"username":"search","password":"J3bGPZzQ7asjJcCk","virtual_host":"search","indexer":"amqp","http_logging":"true","core":"cody"},"query_connection":{"uri":"http://search-op-v2/solr/cody/","proxy":null,"connection":{"parallel_manager":null,"headers":{"User-Agent":"Faraday v1.0.1"},"params":{},"options":{"params_encoder":"Faraday::FlatParamsEncoder","proxy":null,"bind":null,"timeout":null,"open_timeout":null,"read_timeout":null,"write_timeout":null,"boundary":null,"oauth":null,"context":null,"on_data":null},"ssl":{"verify":true,"ca_file":null,"ca_path":null,"verify_mode":null,"cert_store":null,"client_cert":null,"client_key":null,"certificate":null,"private_key":null,"verify_depth":null,"version":null,"min_version":null,"max_version":null},"default_parallel_manager":null,"builder":{"adapter":{"name":"Faraday::Adapter::NetHttp","args":[],"block":null},"handlers":[{"name":"Faraday::Response::RaiseError","args":[],"block":null}],"app":{"app":{"ssl_cert_store":{"verify_callback":null,"error":null,"error_string":null,"chain":null,"time":null},"app":{},"connection_options":{},"config_block":null}}},"url_prefix":"http://search-op-v2/solr/cody/","manual_proxy":false,"proxy":null},"update_format":"RSolr::JSON::Generator","update_path":"update","options":{"url":"http://search-op-v2/solr/cody"}}},"query":{"params":{"per_page":50,"term":"tag:\"utility\"","current_player":null,"sort":"map(difficulty_value,0,0,999) asc"},"parser":"MathWorks::Search::Solr::QueryParser","directives":{"term":{"directives":{"tag":[["tag:\"utility\"","","\"","utility","\""]]}}},"facets":{"#\u003cMathWorks::Search::Field:0x00007f4a00c5da40\u003e":null,"#\u003cMathWorks::Search::Field:0x00007f4a00c5d9a0\u003e":null},"filters":{"#\u003cMathWorks::Search::Field:0x00007f4a00c5d0e0\u003e":"\"cody:problem\""},"fields":{"#\u003cMathWorks::Search::Field:0x00007f4a00c5dcc0\u003e":1,"#\u003cMathWorks::Search::Field:0x00007f4a00c5dc20\u003e":50,"#\u003cMathWorks::Search::Field:0x00007f4a00c5db80\u003e":"map(difficulty_value,0,0,999) asc","#\u003cMathWorks::Search::Field:0x00007f4a00c5dae0\u003e":"tag:\"utility\""},"user_query":{"#\u003cMathWorks::Search::Field:0x00007f4a00c5dae0\u003e":"tag:\"utility\""},"queried_facets":{}},"options":{"fields":["id","difficulty_rating"]},"join":" "},"results":[{"id":2413,"difficulty_rating":"easy-medium"},{"id":2415,"difficulty_rating":"medium-hard"}]}}