Save matrix created within app designer

Hi All, I am trying to save a 1x18 matrix that contains the results of my data processing all whithin the same app designer CallBack function.

The matrix is called Results and I am doing as follows at teh end of all calculations:

fname = strcat ('R',num2str (r),'S',num2str(s),'_results.txt') 
save  (fname, 'Results','-ascii')

However, when I check the file created it is full of zeros. I copy pasted the same script in the command windows and it works perfectly. Am I missing something? Is there a specific way to do this in app designer? I've already tried a couple of suggestions from teh web, but nothing works.

Cheers

eduardo

Answer 1

[Rik]

If you use fprintf you have full control over the format in which your data is written. I tend to suggest avoiding save/load when dealing with files that aren't in the .mat format.

It shouldn't matter if you are in AppDesigner or not, as long as the inputs are the exact same.

[Luis Eduardo Cofré Lizama]

Thansk Rik, however, I am unable to get it working using fprintf. I tried as below:

fileID = strcat ('R',num2str (r),'S',num2str(s),'_results.txt');
                fprintf  (fileID,'%d\n',Results)

I'll apreciate you can help me if fprintf can be a solution.

Cheers

Eduardo

[Rik]

You need to generate a file ID with fopen:

filename=fullfile(ParentFolder,...
    sprintf('R%dS%d_results.txt',r,s));
fileID=fopen(filename,'w');
fprintf(fileID,'%d\n',Results);
fclose(fileID);

[Luis Eduardo Cofré Lizama]

Thanks a lot Rik, almost there, just need to figure out how to get a "0.000" format and tab or comma separated values.

Cheers

Eduardo

[Rik]

Look into the documentation of fprintf or sprintf. Those will explain how to create a tab character or get a specific format.