"Dotan Cohen" <[EMAIL PROTECTED]> writes: > 2008/12/10 <[EMAIL PROTECTED]>: >> On Dec 5, 9:51 am, Xah Lee <[EMAIL PROTECTED]> wrote: >>> >>> For those of you who don't know linear algebra but knows coding, this >>> means, we want a function whose input is a list of 3 elements say >>> {x,y,z}, and output is also a list of 3 elements, say {a,b,c}, with >>> the condition that >>> >>> a = x/Sqrt[x^2+y^2+z^2] >>> b = y/Sqrt[x^2+y^2+z^2] >>> c = z/Sqrt[x^2+y^2+z^2] >> >>> >>> In lisp, python, perl, etc, you'll have 10 or so lines. In C or Java, >>> you'll have 50 or hundreds lines. >> >> Ruby: >> >> def norm a >> s = Math.sqrt(a.map{|x|x*x}.inject{|x,y|x+y}) >> a.map{|x| x/s} >> end > > If someone doesn't counter with a Python one-liner then I'm going to > port that to brainfuck.
from numpy.linalg import norm :) -- http://mail.python.org/mailman/listinfo/python-list