is it possible to save csv files in loop with fopen..getting error Error using fopen Invalid permission.

for k=1:38
    Column_1_t=(1:1000)*0.00008
    Column_2_output = cellstr(num2str(Y{k}.OutputData));
    mag = Y{k}.OutputData;
    % change name here to write
    % change name here to write
    savedfile = folder_name;

    fid_out(k) = fopen(num2str(k),'savedfile_.csv','w'); %open file and create fid %here i am getting error
    
    %save tab-separated column headers
    %define column format and names and save to file
    fprintf(fid_out(k),'%s%s%s\n','time',',','Cal');
    fprintf(fid_out(k),'%s%s%s\n','(ms)',',','(V)');
    fprintf(fid_out(k),'\n');
    %save tab-separated columns of data
    for i = 1:size(data,1) %loop trough each line of each data variable and save to file line by line
        
        %define column format and date to be saved.
        %use () for numeric data, and {} for strings
        fprintf(fid_out(k),'%0.8f%s%0.8f\n',data(i,1),',',data(i,2));
    end
    fclose(fid_out(k))
    
end

Answer 1

[Star Strider]

It would be easier to use csvwrite (or writematrix) than creating you own version.

[mathematics]

Thank you very much. Is it possible to give loop in this code line? It is working when i am using without num2str(k) for single data but with loop for multiple file save it doesnt work. DO you have any suggestion to edit in this code line?

 fid_out(k) = fopen(num2str(k),'savedfile_.csv','w'); %open file and create fid %here i am getting error

[Star Strider]

As always, my pleasure!

Sure!

See: Import or Export a Sequence of Files and How can I process a sequence of files?

[mathematics]

Thank you very very very much. It works.

[Star Strider]

As always, my plesure!