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From: Pallab Ghosh on 9 Apr 2010 10:35
Hi All,
I am a new user of Parallel Computing Toolbox. Would you please help me to figure out how to save a matrix (generated from parfor loop) as a text file. Here is the example:

A = zeros(3, 3, 10);
parfor k = 1:10
A(:, :, k) = k*rand(3);
end

Now I want to save matrix "A" as a text file.

I used all the following format but nothing works:

'-ascii' 8-digit ASCII format.

'-ascii', '-tabs' Tab-delimited 8-digit ASCII format.

'-ascii', '-double' 16-digit ASCII format.

'-ascii', '-double', '-tabs' Tab-delimited 16-digit ASCII format.

I got the following error : "Warning: Attempt to write an unsupported data type to an ASCII file.Variable 'A' not written to file."

Thanks and Regards,
Pallab (Student).

From: C T on 9 Apr 2010 12:40
"Pallab Ghosh" <karna.sakara(a)gmail.com> wrote in message <hpndvg$pep$1(a)fred.mathworks.com>...
> Hi All,
> I am a new user of Parallel Computing Toolbox. Would you please help me to figure out how to save a matrix (generated from parfor loop) as a text file. Here is the example:
>
> A = zeros(3, 3, 10);
> parfor k = 1:10
> A(:, :, k) = k*rand(3);
> end
>
> Now I want to save matrix "A" as a text file.
>
> I used all the following format but nothing works:
>
> '-ascii' 8-digit ASCII format.
>
> '-ascii', '-tabs' Tab-delimited 8-digit ASCII format.
>
> '-ascii', '-double' 16-digit ASCII format.
>
> '-ascii', '-double', '-tabs' Tab-delimited 16-digit ASCII format.
>
> I got the following error : "Warning: Attempt to write an unsupported data type to an ASCII file.Variable 'A' not written to file."
>
> Thanks and Regards,
> Pallab (Student).

The problem is not the parfor, but the 3D matrix. You are basically trying to save a 3D matrix to a text file which are not supported by matlab. The easiest thing is to change A back to 2D matrix. Like below:
As=reshape(A,3,30);
save -ascii 'As.txt' 'As'
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