How using a script of variables in a parfor loop ?
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Hello,
I have gathered the declaration of variables in one and the same script, to simply reduce the number of lines in the main function. The script of variables therefore contains:
Var1 = 2;
Var2 = 3;
....
The loop just reads the script.
parfor i = 1:5
scriptOfVariables
Var3 = Var1 + Var2
end
It seems that parfor does not accept it and I have to write the set of variables directly in the loop.
Any idea to avoid overloading the loop?
2 Comments
Ive J
on 13 Jan 2022
why not save/load the variables in/as mat/struct? Though not sure about overhead issues (should be fine if variables are few).
Accepted Answer
Matt J
on 13 Jan 2022
Edited: Matt J
on 13 Jan 2022
Does scriptOfVariables use the loop counter i in any way? If not, you should move it outside the loop,
scriptOfVariables;
parfor i = 1:5
Var3 = Var1 + Var2;
end
Otherwise, you should be using a function instead
parfor i = 1:5
[Var1,Var2]=mfunction(i);
Var3 = Var1 + Var2;
end
4 Comments
Matt J
on 15 Jan 2022
From what I understand, Matlab cannot recognize structures declared outside the loop and used inside the loop.
No, that's not the problem. The problem is that you are not allowed to assign to variables declared outside the loop unless it is a sliced variable. However, you can return the struct from a function:
parfor i = 1:5
[S,Var1,Var2]=declareTemp();
Var3 = Var1 + Var2
struct.var(1).type = 6;
....
end
function [S,Var1,Var2]=declareTemp()
Var1 = 2;
Var2 = 3;
struct.var(1) = 5;
struct.var(2) = 7;
end
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