Export numeric multidimensional array

Hi All I have an MxMxT numeric array. Is it possible to export it in txt format?

Thank you, Veni

Answer 1

[Jan]

Yes, why not. The question is only, which kind of format you want. E.g. this is simple:

A    = rand(3,4,5);
File = fullfile(YourFolder, 'Output.txt');
fid  = fopen(File, 'r');
if fid == -1, error('Cannot open file: %s', File);
fprintf(fid, '%g\n', A);
fclose(fid);

Then you get a single column of values. The information about the original dimension is lost. So perhaps you want to insert the array size as first line? Or you can create a file with M columns. Perhaps you want to insert a blank line after each MxM sub-matrix. This is up to you. The more details you specify, the more complicated is the function to import the data.

Note that text files are useful, if a human has to edit it. In all other cases binary files are better.

[veni]

Y(:,:,1) =

     1     1     1
     1     1     1
     1     1     1

Y(:,:,2) =

     1     0     0
     0     1     1
     0     1     1

Y(:,:,3) =

     1     0     0
     0     1     1
     0     1     1

Answer 2

[veni]

Hi Jan,

Thanks for your message. For some reason I cannot figure out, the example returns an error message (Cannot open file: C:\Users\veni\Documents\MATLAB\Similarities\Output.txt as my folder is the 'C:\Users\veni\Documents\MATLAB\Similarities\').

My results are of the form Y(:,:,1) =

     1     1     1
     1     1     1
     1     1     1

Y(:,:,2) =

     1     0     0
     0     1     1
     0     1     1

Y(:,:,3) =

     1     0     0
     0     1     1
     0     1     1

etc.

I had a thought of exporting them as a single time series and reshape it. But I feel that this is not an efficient way. Any ideas?

Thank you in advance. Veni

[Steven Lord]

My guess is that you don't have write permission in that directory. To check this, try to write to a file in your TEMPDIR.

[Jan]

@veni: Please explain the wanted format for the file and if you really need a text file.