Cody Challenge

Basic to advanced MATLAB problems created by the Cody Team at MathWorks.
A great starting place for new Cody players! 

Cody Challenge Master

+50 points

Problem Title	Likes	Solvers
Problem 71. Read a column of numbers and interpolate missing data Created by: Cody Team Tags data cleaning, average	11	792
Problem 72. Interpolator Created by: Cody Team Tags interpolation	8	1310
Problem 71. Read a column of numbers and interpolate missing data Created by: Cody Team Tags data cleaning, average	11	792
Problem 70. Alphabetize by last name Created by: Cody Team Tags regexp, sorting	6	797
Problem 69. Find the peak 3n+1 sequence value Created by: Cody Team Tags 3n+1	9	790
Problem 68. Kaprekar Steps Created by: Cody Team Tags matlab, lookup table, poor_problem_statement	13	746
Problem 67. Find common elements in matrix rows Created by: Cody Team Tags matlab	8	808
Problem 66. Find the two-word state names Created by: Cody Team Tags states, regexp	2	558
Problem 65. Word Counting and Indexing Created by: Cody Team Tags strings, poor_test_suite	4	414
Problem 64. The Goldbach Conjecture, Part 2 Created by: Cody Team Tags primes	12	961
Problem 63. Encode Roman Numerals Created by: Cody Team Tags encoding, lookup table	0	522
Problem 62. Elapsed Time Created by: Cody Team Tags time	10	1400
Problem 61. Find state names that end with the letter A Created by: Cody Team Tags regexp, states	5	551
Problem 60. The Goldbach Conjecture Created by: Cody Team Tags primes	44	3305
Problem 59. Pattern matching Created by: Cody Team Tags indexing	8	1102
Problem 58. Tic Tac Toe FTW Created by: Cody Team Tags game, tic tac toe, fun	12	550
Problem 57. Summing Digits within Text Created by: Cody Team Tags strings	5	1055
Problem 56. Scrabble Scores Created by: Cody Team Tags strings, scrabble	6	721
Problem 55. Counting Sequence Created by: Cody Team Tags encoding	8	647
Problem 54. Maximum running product for a string of numbers Created by: Cody Team Tags matlab, sequences, poor_test_suite	4	816
Problem 53. Duplicates Created by: Cody Team Tags matlab, strings, sets	3	851
Problem 52. What is the next step in Conway's Life? Created by: Cody Team Tags life, automata	16	422
Problem 51. Find the two most distant points Created by: Cody Team Tags distance	4	1233
Problem 50. QWERTY coordinates Created by: Cody Team Tags indexing	2	960
Problem 96. Knight's Tour Checker Created by: Cody Team Tags matlab	12	363
Problem 95. Given two strings, find the maximum overlap Created by: Cody Team Tags matlab	6	300
Problem 94. Target sorting Created by: Cody Team Tags matlab, sorting	20	2933
Problem 93. Calculate the Levenshtein distance between two strings Created by: Cody Team Tags matlab, string metric	8	303
Problem 92. Find state names that start with the letter N Created by: Cody Team Tags regexp, states	1	465
Problem 91. Get the area codes from a list of phone numbers Created by: Cody Team Tags regexp	1	417
Problem 90. Connect Four Win Checker Created by: Cody Team Tags matlab, game	10	332
Problem 89. Counting in Finnish Created by: Cody Team Tags strings, finnish	7	525
Problem 88. It dseon't mettar waht oedrr the lrettes in a wrod are. Created by: Cody Team Tags strings, regexp	7	493
Problem 87. Indexed Probability Table Created by: Cody Team Tags matlab	3	1045
Problem 86. Renaming a field in a structure array Created by: Cody Team Tags matlab	5	541
Problem 85. Remove the polynomials that have positive real elements of their roots. Created by: Cody Team Tags matlab	1	447
Problem 84. Longest Divisor Run Created by: Cody Team Tags matlab	4	339
Problem 83. Prime factor digits Created by: Cody Team Tags primes, poor_test_suite	12	552
Problem 82. Remove the small words from a list of words. Created by: Cody Team Tags matlab	3	474
Problem 81. Mandelbrot Numbers Created by: Cody Team Tags matlab, fractals	4	415
Problem 80. Test for balanced parentheses Created by: Cody Team Tags parens, regexp	8	729
Problem 79. DNA N-Gram Distribution Created by: Cody Team Tags matlab	3	397
Problem 78. Implement a ROT13 cipher Created by: Cody Team Tags matlab, lookup table, cipher	6	649
Problem 77. Clean the List of Names Created by: Cody Team Tags strings	1	616
Problem 76. De-dupe Created by: Cody Team Tags matlab	7	1513
Problem 75. Find the palindrome Created by: Cody Team Tags strings	4	468
Problem 74. Balanced number Created by: Cody Team Tags matlab	14	1579
Problem 73. Replace NaNs with the number that appears to its left in the row. Created by: Cody Team Tags matlab	11	1710
Problem 25. Remove any row in which a NaN appears Created by: Cody Team Tags matlab 101, siam	53	5972
Problem 24. Function Iterator Created by: Cody Team Tags anonymous functions, function handles, nested functions	39	846
Problem 23. Finding Perfect Squares Created by: Cody Team Tags sets, poor_test_suite	46	7262
Problem 22. Remove the vowels Created by: Cody Team Tags regexp, siam	14	3873
Problem 21. Return the 3n+1 sequence for n Created by: Cody Team Tags 3n+1, sample	51	5200
Problem 20. Summing digits Created by: Cody Team Tags strings	20	4828
Problem 19. Swap the first and last columns Created by: Cody Team Tags matlab 101, siam, math	34	9880
Problem 18. Bullseye Matrix Created by: Cody Team Tags matrices	60	3413
Problem 17. Find all elements less than 0 or greater than 10 and replace them with NaN Created by: Cody Team Tags data cleaning, basic matlab	35	11607
Problem 16. Return the largest number that is adjacent to a zero Created by: Cody Team Tags vectors	16	3106
Problem 15. Find the longest sequence of 1's in a binary sequence. Created by: Cody Team Tags diff, strings, regexp	30	2438
Problem 14. Find the numeric mean of the prime numbers in a matrix. Created by: Cody Team Tags easy, matrices	28	5902
Problem 13. Remove all the consonants Created by: Cody Team Tags regexp, basics	9	2525
Problem 12. Fibonacci sequence Created by: Cody Team Tags sequences, siam, fibonacci	54	8396
Problem 10. Determine whether a vector is monotonically increasing Created by: Cody Team Tags vectors, matlab 101	47	9249
Problem 9. Who Has the Most Change? Created by: Cody Team Tags indexing, notice the rignt sequence of money!, poor description	47	5691
Problem 8. Add two numbers Created by: Cody Team Tags matlab 101, siam, basic matlab	63	22979
Problem 6. Select every other element of a vector Created by: Cody Team Tags vectors, indexing, matlab 101	65	16207
Problem 5. Triangle Numbers Created by: Cody Team Tags math, triangle	55	14187
Problem 4. Make a checkerboard matrix Created by: Cody Team Tags matrices, square	139	10734
Problem 3. Find the sum of all the numbers of the input vector Created by: Cody Team Tags easy, matlab 101, vector	60	25601
Problem 2. Make the vector [1 2 3 4 5 6 7 8 9 10] Created by: Cody Team Tags basic, colon, x=1:10	81	29386
Problem 1. Times 2 - START HERE Created by: Cody Team Tags intro, math, basics	116	36177
Problem 49. Sums with Excluded Digits Created by: Cody Team Tags strings	8	984
Problem 48. Making change Created by: Cody Team Tags money	10	1608
Problem 47. Extract leading non-zero digit Created by: Cody Team Tags math, maths, mathematics	1	967
Problem 46. Which doors are open? Created by: Cody Team Tags matlab, iteration	17	1786
Problem 45. Make a Palindrome Number Created by: Cody Team Tags strings	10	1137
Problem 44. Trimming Spaces Created by: Cody Team Tags strings, whitespace	5	1166
Problem 43. Subset Sum Created by: Cody Team Tags matlab	14	735
Problem 42. Find the alphabetic word product Created by: Cody Team Tags matlab	5	1996
Problem 41. Cell joiner Created by: Cody Team Tags matlab, strings	10	2233
Problem 40. Reverse Run-Length Encoder Created by: Cody Team Tags encoding	8	1312
Problem 39. Which values occur exactly three times? Created by: Cody Team Tags search	12	3304
Problem 38. Return a list sorted by number of occurrences Created by: Cody Team Tags vectors, sorting	6	1225
Problem 37. Pascal's Triangle Created by: Cody Team Tags combinatorics, math	13	2514
Problem 36. Find relatively common elements in matrix rows Created by: Cody Team Tags matlab	4	644
Problem 35. Quote Doubler Created by: Cody Team Tags strings, regexp, quotes	6	1528
Problem 34. Binary numbers Created by: Cody Team Tags matlab	19	1913
Problem 33. Create times-tables Created by: Cody Team Tags matrices	39	7665
Problem 32. Most nonzero elements in row Created by: Cody Team Tags matrices	27	5167
Problem 31. Remove all the words that end with "ain" Created by: Cody Team Tags regexp, strings, matlab 101	12	1026
Problem 30. Sort a list of complex numbers based on far they are from the origin. Created by: Cody Team Tags sorting, basic matlab	15	3789
Problem 29. Nearest Numbers Created by: Cody Team Tags vectors, distance	24	2724
Problem 28. Counting Money Created by: Cody Team Tags regexp, strings	7	1934
Problem 27. Pangrams! Created by: Cody Team Tags strings	22	1962
Problem 26. Determine if input is odd Created by: Cody Team Tags easy, basic matlab, why matlab	88	17120

Recent Group Finishers194

Recent Activity

	austine keller submitted Solution 2048305 to Problem 60. The Goldbach Conjecture 10 hours and 27 minutes ago
	austine keller submitted Solution 2048299 to Problem 51. Find the two most distant points 10 hours and 29 minutes ago
	austine keller submitted Solution 2048295 to Problem 29. Nearest Numbers 10 hours and 37 minutes ago
	austine keller submitted Solution 2048294 to Problem 12. Fibonacci sequence 10 hours and 38 minutes ago
	austine keller submitted Solution 2048293 to Problem 4. Make a checkerboard matrix 10 hours and 39 minutes ago