Incompatible indexing of variable for parfor

I have a variable Network which is a cell array of size 5x12. Each cell is 76x1 double. Inside the parfor loop, in every iteration I need to use portions of the variable of size 5x3. This gives me a warning in the parfor that the variable is indexed in a way incompatible for the loop.

Here is a glimpse of my code. Can anybody suggest ways to modify the variable so that it can be made compatible with parfor loop

parfor j=1:4
        sample=Network(:,(2*j)+(j-2):((2*j)+j);
        ........
end

[Bruno Luong]

You column index ara overlapped grouped by 4 from 1 to 13, so I can't see where 5x3 come from

for j=1:4
    (2*j)+(j-2):((2*j)+(j-1))+2
end

ans = 1×4

1 2 3 4

ans = 1×4

4 5 6 7

ans = 1×4

7 8 9 10

ans = 1×4

10 11 12 13

[Hari]

My mistake, it is

parfor j=1:4

sample=Network(:,(2*j)+(j-2):((2*j)+j)

........

end

[Walter Roberson]

overlapping reference to a variable is not permitted.

[Hari]

The result for the code is here. I am not sure what overlapping refers to, but I think there is no overlap here. Correct me if I am wrong

for j=1:4
        (2*j)+(j-2):((2*j)+j)
end

ans = 1×3

1 2 3

ans = 1×3

4 5 6

ans = 1×3

7 8 9

ans = 1×3

10 11 12

[Bruno Luong]

Then reshape your array in 3D

Networkr = reshape(Network, size(Nerworks,1), 3, []);

then use parforloop on the third dimension.

Answer 1

[Edric Ellis]

The total size in bytes of Network is 5*12*76*8 = 36480. That is tiny. Ignore the parfor "broadcast" warning - that is intended to alert you when you might accidentally be sending gigabytes to each worker. It is irrelevant in this case.