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Save char array from for loop into a matrix

Asked by Devarshi Patel on 5 Jun 2019
Latest activity Edited by Adam Danz
on 6 Jun 2019
names=4;
for i = 1:names
totalnames = filename{indx};
end
where filename is a cell array of a list of 4 file names and indx is the location of the files that the user selected from the list dialog box. I am trying to store the names of the files that the user chose through the for loop into a matrix. Can someone please help me out with this?

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2 Answers

Answer by TADA
on 5 Jun 2019
Edited by TADA
on 5 Jun 2019
 Accepted Answer

Unless you can guarantee that all file names have the exact same length, you need to use something other than a char matrix. Either a cell array, or a string array:
names=4;
totalnames = cell(1,names);
for i = 1:names
totalnames{i} = filename{indx};
end

  2 Comments

I am getting the same name in all the cells in the totalnames array, would you know any solution to that?
That's because you're using the same indx on each loop iteration. The indx value doesn't change in this for-loop. If indx is a vector, you don't need a loop (try out my answer). If indx is not a vector, you should tell us more about that variable.

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Answer by Adam Danz
on 5 Jun 2019
Edited by Adam Danz
on 10 Jun 2019

No need to use a loop. If filenames is a cell array of strings and indx is a logical vectory (or linear index vector), you just need to do this:
totalnames = filename(indx);
If you need it to be a char array, run the line above and then this line:
totalnamesArray = strjoin(filenames,'\n');

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