To keep a simulation tidy, I created a dispatcher that generates
random variables drawn from various distributions as follows:
import random
RVType = 1 #Type of random variable - pulled from RVDict
RVDict= {'1': random.betavariate(1,1), '2': random.expovariate(1),
'3': random.gammavariate(1,1), '4': random.gauss(0,1),
'5': random.lognormvariate(1,1), '6':
random.paretovariate(1),
'7': random.uniform( -1,1), '8':
random.weibullvariate(1,2) }
x = []
y=[]
rv = RVDict[str(RVType)]
for i in range(N):
x.append(rv)
y.append(rv)
Oddly, x and y get filled with a single value repeated N times. I
expected to get a different random number appear each time I called
rv ,but this does not happen. Instead, my first call to rv generates a
random number from the appropriate distribution, while subsequent
calls simply repeat the random number generated in the first call.
Where am I going wrong?
Thanks in advance for your help.
Sincerely
Thomas Philips
--
http://mail.python.org/mailman/listinfo/python-list
