use variable name inside dlmwrite with respect to loop variable

I have 10 files and I want to get output filename loop number .

I use this command to get output for a single file but how can I insert loop name inside file name:

dlmwrite('lag_data.txt',a1,'delimiter',' ')

I want this kind of output

for i=1:4
(commands)
dlmwrite('lag_data.txt',a1,'delimiter',' ')
end

output should be like this

lag_data_1.txt

lag_data_2.txt

lag_data_3.txt

lag_data_4.txt

Answer 1

[Stephen23]

https://www.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html

for k = 1:4
    M = ... your matrix
    F = sprintf('lag_data_%d.txt',k);
    dlmwrite(F, M, 'delimiter',' ')
end

[AA]

it works, Thanks :)