How to apply fprinf for matrix

I would like to use fprintf for Writing data to a text file. I want to apply fprintf on the following matrix. I have a matrix with n rows and 3 columns. please help with this issue. thanks a lot. for instance.

0.0000 0.0000 0.0000

0.0000 0.1000 0.0000

0.0643 0.0675 0.0000

0.1000 0.0000 0.0000

0.0000 0.2000 0.0000

0.2000 0.0000 0.0000

0.0725 0.1500 0.0000

0.1488 0.0873 0.0000

0.0726 0.2501 0.0000

0.0000 0.3000 0.0000

0.0000 0.4000 0.0000

0.3000 0.0000 0.0000

0.4000 0.0000 0.0000

[Stephen23]

Don't use a loop! See my answer to know how.

Answer 1

[Stephen23]

This is MATLAB, so there really is no point in using an ugly loop when you can do it much faster and simpler with just one csvwrite call:

csvwrite('test.csv',M)

or with one fprintf call (no loop is required!):

M = [...
  0.0000,0.0000,0.0000;...
  0.0000,0.1000,0.0000;...
  0.0643,0.0675,0.0000;...
  0.1000,0.0000,0.0000;...
  0.0000,0.2000,0.0000;...
  0.2000,0.0000,0.0000;...
  0.0725,0.1500,0.0000;...
  0.1488,0.0873,0.0000;...
  0.0726,0.2501,0.0000;...
  0.0000,0.3000,0.0000;...
  0.0000,0.4000,0.0000;...
  0.3000,0.0000,0.0000;...
  0.4000,0.0000,0.0000];
%
fid = fopen('test.csv','wt');
fprintf(fid,'%f,%f,%f\n',M.')
fclose(fid);

[Ali]

Thanks a lot for helping me to solve this issue.

Answer 2

[Stalin Samuel]

%example code  
s = rand(10,3);
  fileID = fopen('a.txt','w');
  for i=1:length(s)
    fprintf(fileID,'%g\t%g\t%g \r\n',s(i,:));
  end
  fclose(fileID);

[Ali]

Many thanks for your help.

Answer 3

[TastyPastry]

fh = fopen('newFile.txt','w');
for i=1:size(myData,1)
  fprintf(fh,'%d %d %d\n',a(i,1),a(i,2),a(i,3))
end

[Ali]

Thanks a lot for your code.

Answer 4

[Guillaume]

Why not simply use dlmwrite?

dlmwrite('test.csv', M, 'delimiter', ' ');

or if you want to specify the precision

dlmwrite('test.csv', M, 'delimiter', ' ', 'precision', '%6.4f');

[Ali]

Thank you very much Guillaume.