How to fix my code with parfor-Loops array?

My code have a lot of error ,how to fix ?

X = ones( 1 ,3);

B = zeros( 20 ,3);

parfor i = 1 : 6

kIndex = 1+2*(i-1) : 2*i;

B(kIndex,:) = X;

end

Answer 1

[Edric Ellis]

Output variables in parfor must be either sliced or reduction. There's more information in the doc. But basically, you cannot assign into an output variable like B using a computed index in the way that you are doing. One of the subscripts into B must be the loop index i.