On Tue, Jul 10, 2012 at 12:39 PM, Lewis <lewis...@gmail.com> wrote:
> Hi I'm trying to integrate a function that is the derivative of
> another function, but I get a long train of errors. The error is
> really long but ends up with "raise CoercionFailed("expected Number
> object, got %s" % a)
> CoercionFailed: expected Number object, got +inf"
>
> My code:
>
> from sympy import symbols, Symbol, ln, diff, exp, integrate
>
> y = Symbol('y')
> def prob(b_y,y1,y2,p1,p2):
> v1=b_y*(y1-p1)
> v2=b_y*(y2-p2)
> return exp(v1)/((exp(v1)+exp(v2)))
>
> print integrate(-y*diff(prob(.05,80.,y,5,2),y),(y,80.,85))
I get
>>> print integrate(-y*diff(prob(.05,80.,y,5,2),y),(y,80.,85))
Integral(1.92373330245161*y*exp(0.05*y)/(0.90483741803596*exp(0.05*y) + 42.52108
20000628)**2, (y, 80.0, 85))
(see http://tinyurl.com/7oqpu7v or google "sympy bleeding edge")
/c
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