Status: Valid
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 3711 by [email protected]: probability() should handle union
and intersection of conditions as well as point conditions
http://code.google.com/p/sympy/issues/detail?id=3711
Currently,
from sympy.stats import Die, P, Normal
X = Die('X', 6)
Y = Normal('Y', 0, 1)
P(X = 2)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: probability() takes at least 1 argument (0 given)
P(Y = 0)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: probability() takes at least 1 argument (0 given)
P(X > 2 or X < 3)
2/3
P(X > 3 and X > 2)
2/3
Desired :
from sympy.stats import Die, P, Normal
X = Die('X', 6)
Y = Normal('Y', 0, 1)
P(X = 2)
1/6
P(Y = 0)
0
P(X > 2 or X < 3)
1
P(X > 3 and X > 2)
1/2
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