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Using a Variable calculated in a parfor loop

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Alessandro on 25 Nov 2015
Commented: Walter Roberson on 14 Dec 2015
I am calculating the internal forces of the finite elements in a mesh inside a parfor loop:
parfor iel=1:nel
id_1 = Connect(iel,1); % ID of 1st Node
id_2 = Connect(iel,2); % ID of 2nd Node
area = Connect(iel,3); % extract cross-sectional area
el_disp = [U(gdl_n*id_1-(gdl_n-1):gdl_n*id_1,1); U(gdl_n*id_2-(gdl_n-1):gdl_n*id_2,1)]; % Element Displacement Vector [U_i U_j]
[qi{iel,1}] = Internal_Forces(id_1,id_2,el_disp,area,mechanical_parameters];
I am storing the internal forces 'qi' in a cell. This operation is performed correctly, but then I am unable to use the so calculated variable outside such loop (I am trying to use it as the input for a function). Any ideas?


Edric Ellis
Edric Ellis on 26 Nov 2015
Are you trying to use the elements of qi outside the loop? That should be fine, what is the problem you're experiencing?
Alessandro on 14 Dec 2015
Yes, I am. I receive an error saying that the variable cannot be used outside the parfor loop (will give you more details when I get back to work)!
Walter Roberson
Walter Roberson on 14 Dec 2015
Does the problem change if you use
qi{iel,1} = Internal_Forces(id_1,id_2,el_disp,area,mechanical_parameters];
without the []?
Also, in the code you posted you have a carriage return between mechanical_parameters and the ] that follows it.

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