Robert Kern wrote: > Gerhard Fiedler wrote: > > On 2006-07-23 17:12:20, [EMAIL PROTECTED] wrote: > > > >> I am a newbie to Python and would like to genereate some numbers > >> according to geometric distribution. However, the Python Random package > >> seems do not have implemented functionality. I am wondering is there > >> exist any other libraries that can do this job? > > > > The usual way is to generate standard random numbers (linear distribution) > > and then apply whatever transformation you need to generate the desired > > distribution. > > That only works if there is such a transformation. > > The geometric distribution and many others have been implemented in numpy: > > http://www.scipy.org/NumPy > > In [1]: from numpy import random > > In [2]: random.geometric(0.5, size=100) > Out[2]: > array([1, 5, 2, 3, 1, 1, 2, 3, 1, 1, 2, 1, 1, 1, 2, 2, 3, 3, 1, 1, 1, 1, 1, > 2, 2, 1, 1, 1, 1, 1, 3, 1, 1, 3, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 3, 1, > 4, 1, 1, 1, 2, 1, 2, 3, 2, 1, 1, 1, 1, 1, 3, 1, 1, 2, 6, 1, 1, 3, 2, > 1, 1, 2, 1, 1, 7, 2, 1, 1, 2, 1, 1, 2, 4, 1, 2, 1, 4, 2, 1, 1, 2, 1, > 4, 2, 1, 1, 3, 1, 3, 1]) > > -- > Robert Kern > > "I have come to believe that the whole world is an enigma, a harmless enigma > that is made terrible by our own mad attempt to interpret it as though it > had > an underlying truth." > -- Umberto Eco
Thanks a lot. I will try it out. But I am still surprised because the default Random package in Python can generate so few discrete random distritbuions, while it can generate quite a few continuous distribution, including some not very common one. Da -- http://mail.python.org/mailman/listinfo/python-list
