Extract variable from function after using parfeval

I am running the following:

fcn=@(i) run("test"+i);
for K=1:4
    F(K)=parfeval(fcn,0,K);
end;

where "test"+i is a script solving to pricude results in matrix format.

I would like to be able to see this matrix after the worker has finished.

I have tried setting the cript as a fucntion and having an outout:

function [Result1]= test1

however I still get no data out of this after using fetchOutputs.

How can i get the variable I require after parfeval has finished?

[Abderrahim. B]

Did you check if the worker has finished the processing?

[Koren Murphy]

Yes it has

Answer 1

[Raymond Norris]

@Koren Murphy the issue is that you've told MATLAB there are no output arguments (even if there are)

F(K)=parfeval(fcn,0,K);

The "0" is the number of output arguments. Change this appropriately. For instance

for idx = 1:10
    f(idx) = parfeval(@rand,1,idx);
end

% Now fetch the results
for idx = 1:10
    [idx, value] = fetchNext(f);
    R{idx} = value;
end

[Koren Murphy]

fcn=@(i) run("test_"+i);
for idx = 1:4
    f(idx) = parfeval(fcn,1,idx);
end
% Now fetch the results
for idx = 1:4
    [idx, value] = fetchNext(f);
    R{idx} = value;
end

I know have this with fucntions defiend as

function [testRes1]= test_1

However, i now get this error....

Error using parallel.FevalFuture/fetchNext
The function evaluation completed with an error.

Error in EFM_MILP_Parallel_DataSetUp (line 43)
[idx, value] = fetchNext(f);

Caused by:
Error using EFM_MILP_Parallel_DataSetUp>@(i)run("EFMLoop_"+i)
Too many output arguments.

[Raymond Norris]

The run command doesn't return any outputs. Presumable this is a test example. Replace it with the function you're going to actually run.