Question

I know there has got to be a cleaner more elegant way to do this. I have an array of number in the range [0,1] and want to check which ones are greater than a threshold. I remember there being some syntax to do this nicely. In python I would use something like a lambda function.

p = sigmoid(dot(theta,X));
for i =1:size(p)
   if(p(i)>=0.5)
      p(i)=1
   else
       p(i)=0
   end
end

Answer 1

mtrw is on the right track, but it gets even shorter:

p = (p >= 0.5);