How to save in a sequence of files each output of a "for" loop

A have a number of txt files with data, and names like ABR1998, ABR1999 etc. I am running a script that includes a "for" loop to manupulate these files and I want each time the output is saved in txt files with the same (or similar name) e.g. ABRa1998,ABRa1999 etc. The output of each loop is the "A" (see below) which is a matrix with several columns and rows of data. Could you please tell me how to do this? Thanks-K.

matfiles=dir(fullfile('N:','My Documents','MATLAB','runfilesABR', '*.txt'));

    for n=1998:2005
        filename = ['ABR', int2str(n), '.txt'];
        A=load(filename);
        XXXXXXXXXX
        XXXXXXXXXX
        [d,c] = find(isnan(A));
        A(d,:) = [];
        A
    end

Answer 1

[Star Strider]

In the function forms of save and load, all arguments have to be strings:

filename = ['ABRa', int2str(n), '.txt'];
save(filename, 'A', '-ascii');

[Katerina F]

Many thanks it works. K.

[Star Strider]

My pleasure!

Answer 2

[Guillaume]

save(filename, A, '-ascii'); %change filename if you wish

I don't particularly understand why you're getting the list of file in the runfilesABR directory and then never you that list, though.

Can you write the code you used to generate the new filename? As the message tells you it's not a string.

[Image Analyst]

Katerina's "Answer" moved here:

Hi Guillaume, thanks, I tried it (changing the filename) but it gives me the following error message:

Error using save Argument must contain a string.

Error in doublichoose (line 46) save(filename, A, '-ascii');

[Katerina F]

I use the same code with the code above (in my original question) to generate (change) the filename:

filename = ['ABRa', int2str(n), '.txt'];
save(filename, A, '-ascii');

Then I get the message:

Error using save Argument must contain a string.

Error in doublichoose (line 46) save(filename, A, '-ascii');

How should I modify the code that saves the file?

[per isakson]

Add the lines

    filename
    whos A

before save or put a breakpoint at save to verify that they have appropriate values

[Katerina F]

I tried it. It shows the same error message