Hello!
I'm having a little trouble with some integration.
My goal is to set up a cumulative distribution for some functions. The one
below is my attempt at the gamma distribution. However, it does not like
the integrate statement.
>>> x, y, t = symbols('x y t')
>>> shape = float(4.0)
>>> scale = float(1.5)
>>> z2 = (scale**shape)*gamma(shape)
>>> y = ((x*(shape-1))*exp(-x/scale))/z2
>>> y
0.0987654320987654*x*exp(-0.666666666666667*x)
>>> integrate(y,(x,0,t))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File
"/usr/local/lib/python2.7/dist-packages/sympy/utilities/decorator.py", line
30, in threaded_func
return func(expr, *args, **kwargs)
File
"/usr/local/lib/python2.7/dist-packages/sympy/integrals/integrals.py", line
1626, in integrate
risch=risch, manual=manual)
Has anyone run into this before, please?
Thanks in advance for any help.
Sincerely,
Erin
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