Replacing values in a logical vector based on a rule

So I have a logical column vector, that I have transformed into a double (it is 21080x1). I am now trying to replace every "1" with the corresponding row value from a different array, but what I am getting out is: [0,1].

Any help would be greatly appreciated.

for n= 1:numel(Behaviours) %Behaviours is a 27x1 cell array
        temp = strcmp(Group1_KOs.BehaviourType, Behaviours(n)); %creates the logical vector
        temp = double(temp); %convert to a double (just in case)
        if temp(i) == 1 %where temp(i) is 1, replace with:
            temp(i) =Group1_KOs.BehaviourData(i,7); %value in i'th row, 7th column
        end

Answer 1

[Stephen23]

Try using logical indexing rather than a loop:

idx = strcmp(Group1_KOs.BehaviourType, Behaviours(n));
tmp = double(idx);
tmp(idx) = Group1_KOs.BehaviourData(idx,7)

or alternatively just multiply the index by those values:

tmp = idx.*Group1_KOs.BehaviourData(:,7)