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How to save multiple text files with same name, but with incrementing numbers

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Hi all,
I need to save multiple text files with the same name, just incrementing numbers at the end of the filename. The function I'm using, writetable, requires to specify the filename between apostrophes, so the function cannot recognize the changing filename, returning as output always the same. Thank you!
str = 'ccc2019RS';
t = 0;
for f = 1:74
t = t + 1;
Filename = [str,num2str(t)];
tab = table(Y(:),M(:),D(:),H(:)),astrF(:,f),ssh2D(:,f),tempF(:,f),salF(:,f));
writetable(tab,'FileName.dat','Delimiter','tab','WriteVariableNames',false);
clear tab FileName
end

  2 Comments

Stephen Cobeldick
Stephen Cobeldick on 22 Sep 2020 at 3:40
Get rid of this line:
clear tab FileName
It is entirely pointless and unnecessarily slows down your code. Trying to micro-manage MATLAB memory management without really understanding how it works usually results in complex, inefficient code.

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Accepted Answer

sushanth govinahallisathyanarayana
sushanth govinahallisathyanarayana on 22 Sep 2020 at 0:25
Instead of filename.dat, you could substitute
['myFilename_',num2str(i),'.dat], as the loop increments, it will create a new name.
Hope this helps,

More Answers (1)

Stephen Cobeldick
Stephen Cobeldick on 22 Sep 2020 at 3:37
Edited: Stephen Cobeldick on 22 Sep 2020 at 3:40
"The function I'm using, writetable, requires to specify the filename between apostrophes..."
Actually the writetable documentation states that the filenames must be specified by a character vector or a scalar string. In either case it makes no difference if the name is specified in the function call or supplied as a variable.
"so the function cannot recognize the changing filename"
Actually it does (just like all MATLAB function that read/write file data do). For example, you could do this:
fnm = sprintf('%s%d.dat',str,t);
..
writetable(tab,fnm,..);
Read more:

  1 Comment

Luís Henrique Bordin
Luís Henrique Bordin on 22 Sep 2020 at 11:54
Sorry for my ignorance, I am a beginner, and I have difficulty understanding how to structure the sprintf function. The option sugested by Sushanth was usefull, nevertheless, I'll try to use sprintf in the future, thank you!

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