How to save a matrix as text file?

I want to save a matrix as text file.

Each column should be separated by tab.

The output file should be read with any text editor

When the output is opened, it should display the numbers

in the same way it looks like in Matlab.

Thank you for your help

Emerson

Answer 1

[Matt Fig]

One way is to use FPRINTF.

A = round(rand(6,7)*9)  % Write this to file.
fid = fopen('Mymatrix.txt','wt');

for ii = 1:size(A,1)
    fprintf(fid,'%g\t',A(ii,:));
    fprintf(fid,'\n');
end
fclose(fid)

EDIT

Changed the 'w+' to 'wt' in the FOPEN call.

If you have floating point numbers, you may want to use '%20.18f \t' instead of '%g\t' or similar. See FPRINTF for format specifiers.

Answer 2

[Sean de Wolski]

doc dlmwrite
doc fwrite

[Bill Tubbs]

dlmwrite is not recommended. Use writematrix instead.

[Walter Roberson]

writematrix() did not exist in 2011 when the answer was posted.

Answer 3

[Walter Roberson]

You could also consider dlmwrite telling it to use \t as the delimiter.

You could also consider using

save('MyMatrix.txt', 'A', '-double', '-tab')

Where A is the name of the variable

[CreLox]

Should be:

save('MyMatrix.txt', 'A', '-ascii', '-double', '-tabs')

[Jairo C Peralta]

what is the "double" part for?

[Walter Roberson]

double precision. Without the -double only about 7 digits are written out, about as much as needed to reproduce single precision numbers.

Answer 4

[Anmar Mohammed]

thank you very much sir