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Merge numeric values of 2 columns into 1

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Andrea Boa
Andrea Boa on 16 Jun 2020
Commented: Robert U on 16 Jun 2020
Hello,
I am importing data from COMSOL Multiphysics to Matlab, and the data is imported wrong. Some values are divided into different cells when they should not, and the second cell contains the information for the next value. For example: the columns [-4.83853986927724E-7, -5.796128574671958E-7] show in 2 different columns as [-4.838539869 , 27724E-7 -5.796128574671958E-7]
I would like to divide the second column (withouth changing the value 27724E-7 to 2.7724E-3 - so maybe using strings?) and join such value to the previous column. Does anybody know how?
Thanks!
  2 Comments
Andrea Boa
Andrea Boa on 16 Jun 2020
The data is quite large. There are several columns showing this error, although the ones I used as example are in columns KX and KY.

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Answers (1)

Robert U
Robert U on 16 Jun 2020
Hi Andrea Boa,
probably your import function is not correct regarding either format or delimiter, or both. The following function converts the given data into a double-matrix. I hope it serves your needs.
function [dataOut] = importComsolTable(strFileName)
fID = fopen(strFileName);
dataIn{1,1} = fgetl(fID);
while ischar(dataIn{end})
dataIn{end+1,1} = fgetl(fID);
end
dataIn = dataIn(1:end-1,1);
fclose(fID);
Data = dataIn(cellfun(@isempty,regexp(dataIn,'%%*')));
Data = cellfun(@(strIn)strsplit(strIn,char(9))',Data,'UniformOutput',false);
dataOut = str2double([Data{:}]');
end
Function test call:
Test = importComsolTable('Emy.txt');
Kind regards,
Robert
  3 Comments
Robert U
Robert U on 16 Jun 2020
function [dataOut] = importComsolTable(strFileName)
fID = fopen(strFileName);
dataIn{1,1} = fgetl(fID);
while ischar(dataIn{end})
dataIn{end+1,1} = fgetl(fID);
end
dataIn = dataIn(1:end-1,1);
fclose(fID);
Data = dataIn(cellfun(@isempty,regexp(dataIn,'%%*')));
Data = cellfun(@(strIn) regexprep(strIn,'\t(?=\d*[E]([+]|[-])\d+)',''),Data,'UniformOutput',false);
Data = cellfun(@(strIn) regexprep(strIn,sprintf('%s{3,4}',char(32)),'\t'),Data,'UniformOutput',false);
Data = cellfun(@(strIn)strsplit(strIn,char(9))',Data,'UniformOutput',false);
dataOut = str2double([Data{:}]');
end

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