How to save Parfor loop output in text file.

[Pallab Ghosh]

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).

[C T]

"Pallab Ghosh" <karna....@gmail.com> wrote in message <hpndvg$pep$1...@fred.mathworks.com>...

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'

[Hassaan Mustafa]

Hello Sir, i am having a question regarding dlmwrite ... is it possible to use dlmwrite within a loop to save results in text file each time with new file name.

what i am doing is taking several thousands inputs , for which i used looping method, within loop, a file is taken as input and then apply some functions and bla bla stuff of DSP applied over it, and output comes which is stored in a variable called as "D" ... that output is in the form of "m x m" matrix (Square matrix) and i want to save that result in a txt file. and the loop goes on to the next input... can you tell me how to do so

to do it on a single file, without using loop, i am doing this in by this manner

img=imread(image.png);
%function here some long calculation which leads to results in a matrix called D
D=function_results;
dlmwrite("results.txt",D);

now that works fine for a single file without loop. Now can you give some guidelines regarding saving within loop, Like

- loop starts, (I've done this)
- read the file, (I've done this)
- apply the function, (I've done this)
- store results in variable "D" (I've done this)
- that result saves in text file whose name is the same name of the input file but extension be text ( not able to solve this riddle)
- display the result (I've done this)
- go to next file (I've done this)

Thanking in regards.

P.S. I've tried save and fprintf, but i am not able to achieve the desired results.