Hi, I have the following script import fileinput import string from math import * from scipy import * from rpy import * import Numeric import shelve import sys def dpolya1(n,N,b,a): a=float(a) b=float(b) L=784 probs=((special.gammaln(N+1)+special.gammaln(L*(a/b))+special.gammaln((a/b)+n)+special.gammaln((a/b)*(L-1)+N-n))-(special.gammaln(L*(a/b)+N)+special.gammaln(a/b)+special.gammaln(n+1)+special.gammaln(N-n+1)+special.gammaln(L*(a/b)-(a/b))))#) return probs and I observe the following "strange" (for me of course) behaviour
dpolya1(1,2,0.5,0.4) -5.9741312822170585 type(dpolya1(1,2,0.5,0.4))
exp(dpolya1(1,2,0.5,0.4)) Traceback (most recent call last): File "<stdin>", line 1, in ? AttributeError: 'numpy.ndarray' object has no attribute 'exp'
I do not understand what's wrong. Any help? Thanks Angelo