On Aug 16, 2010, at 20:37 , Jah_Alarm wrote:
hi,
I need to generate a binary array with a specified average proportion
of 1s (e.g. [1 0 0 0
0 1 0 0] has this proportion = 25%). In Matlab I run something like
random(m,n)<p where p is the value
between 0 and 1. I'm trying to use random.randint(0,2,size=[m,n]), but
I don't understand how to specify this proportion p.
if you're coming from matlab, then you should use the numpy package
(and you can post questions on the numpy list). In that case, you
can do:
from numpy import *
random.rand(5,7)<0.25
array([[False, True, True, False, False, True, False],
[False, False, False, False, True, False, False],
[ True, False, False, False, False, False, True],
[ True, False, True, False, False, False, False],
[False, False, False, False, False, False, False]], dtype=bool)
just like matlab.
bb
--
Brian Blais
bbl...@bryant.edu
http://web.bryant.edu/~bblais
http://bblais.blogspot.com/
--
http://mail.python.org/mailman/listinfo/python-list
