"RonnyM" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > e.g. y = [ 1, 2, 3, 4, 5, 6 ,7 ,8, 9 ]
> ybar = [ 1, (1 + 3)*.5,(2 + 4)*.5,(3 + 5)*.5,..., (n-1 + n+1)*.5 ], n = > 1,...len(y) -1 > How do I make a vectorized version of this, I will prefer not to > utilize Map or similar functions, but numeric instead. You treat the first element asymmetrically, so that does not vectorize. The rest does: >>> import numpy as N >>> y=N.arange(1,10) >>> slice1 = slice(0,-2,1) >>> slice2 = slice(2,None,1) >>> ybar = 0.5*(y[slice1]+y[slice2]) >>> ybar array([ 2., 3., 4., 5., 6., 7., 8.]) hth, Alan Isaac -- http://mail.python.org/mailman/listinfo/python-list
