using fprintf for matrix csv file

I have a matrix A with size 96x16. I am running hundreds of iterations and I want to save A for each iteration. Could someone please help me how I can do this using fprintf() in Matlab.

fid = fopen('Results.csv','wt');
for k=1:1:100
    A= (some equation);
    fprintf(fid, '%12.6f', A);
    fprintf(fid, '\n'); 
end
fclose(fid)

Answer 1

[Voss]

fid = fopen('Results.csv','wt');
ncol = 16;
format_str = [repmat('%12.6f,',1,ncol) '\n'];
for k = 1:100
    A = (some equation);
    fprintf(fid, 'Iteration %d\n', k);
    fprintf(fid, format_str, A.');
    fprintf(fid, '\n'); 
end
fclose(fid);