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How to add a new column to several matrices
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Hi, I currently have a series of 100 files (each a matrix with 2 columns but varying rows). I would like to add a third column to eah file each containing one number in all the rows.
For example, the first file should have a third column with the numbers 1 entered in all rows, the second file with the number 2, the third with 3 and so on.
I have managd to add a new column to one fo the files using this code.
file1(:,3) = 1
However I would like to be able to do this automatically for all 100 files without having to do this for each file. Is there a way to create a loop to do this for me?
Thanks!
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Thiago Henrique Gomes Lobato
le 19 Jan 2020
How you read your files? It should actually be very straight forward, something like this should help (Read it mosty as a pseudo-code):
Nfiles = 100;
for idx = 1:Nfiles % loop for all your files
File = load(['blabla_',num2str(Nfiles),'.mat']); % Insert here how you read the file
File(:,3) = idx; % idx will always increase
save(['blabla_',num2str(Nfiles),'.mat'],'File') % Save the file back
end
If your files can't be easily indexed (are not numbered from 1 to 100) you can use the dir function to list all names and then loop through it.
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