Status: Valid
Owner: ----
Labels: Type-Defect Priority-Medium Integration
New issue 3655 by [email protected]: nan in compute_innermost
http://code.google.com/p/sympy/issues/detail?id=3655
I ran this script
from sympy.stats import *
from sympy import Tuple, Eq, simplify, Symbol, pprint
X = Normal('x', 3, 4)
Y = Normal('y', 5, 6)
Z = Normal('z', 0, 1)
# X, Y, and Z given that Z+Y == X
XX, YY, ZZ = given(Tuple(X, Y, Z), Eq(Z+Y, X))
w = Symbol('w')
pprint(simplify(density(XX**2)(w)))
And received this error
return bool(self.p*other.q < self.q*other.p)
AttributeError: 'NaN' object has no attribute 'q'
I was able to correct the result with this hack
https://github.com/mrocklin/sympy/commit/b49e839c4ea9ceaa89952742966780bb1a730702
But presumably there is some deeper issue
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