[Numpy-discussion] fastest way to make two vectors into an array

I have two equal length 1D arrays of 256-4096 complex or floating point numbers which I need to put into a shape=(len(x),2) array. I need to do this a lot, so I would like to use the most efficient means. Currently I am doing: def somefunc(x,y): X = zeros( (len(x),2), typecode=x.typecode()) X[:,0] = x X[:,1] = y do_something_with(X) Is this the fastest way? Thanks, John Hunter