#9769: symbolic function do not work with numpy.int64 arguments
-------------------------+--------------------------------------------------
Reporter: maldun | Owner: burcin
Type: defect | Status: new
Priority: major | Milestone: sage-4.7.1
Component: symbolics | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Changes (by burcin):
* milestone: => sage-4.7.1
Comment:
Note that there is no coercion when you call
{{{
sage: import numpy
sage: vec = numpy.array([1,2])
sage: sin(vec)
array([ 0.84147098, 0.90929743])
}}}
The `__call__()` function for `sin` checks if the argument is a numpy
array and calls the right numpy function on this input. See line 349 of
`sage/symbolic/function.pyx`. We can handle other numpy types there.
We cannot work with matrices as numeric objects in symbolics. I suppose
you expect the sin() function to be applied to each entry of the matrix.
The `apply_map()` method should be used for this purpose:
{{{
sage: t = Matrix(ZZ, 2,2)
sage: t.randomize()
sage: t.apply_map(lambda x: sin(x))
[ 0 -sin(1)]
[ sin(4) 0]
}}}
-----
{{{
sage: x = PolynomialRing(RR, 'x').gen()
sage: sin(x)
<boom>
}}}
The problem here is really coercion, but it should be copied to another
ticket (in the basic_arithmetic component):
The `__call__()` function of RR[x] doesn't conform to the generic
definition. You should be able to give the parameters as a keyword
argument as well. This should be made to work:
{{{
sage: R.<x> = RR[]
sage: (x^2+1)(x=5)
11
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9769#comment:2>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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