Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 1312 by danielstefanmader: provide a way to calculate the
constant coefficient of a polynomial
http://code.google.com/p/sympy/issues/detail?id=1312
We need a means to calculate the constant coefficient of a polynomial.
Currently f.coeff(1) always returns nothing, which makes no sense:
In [1]: sympy.var('a b c d x')
Out[1]: (a, b, c, d, x)
In [2]: f = a*x**2 + b*x + c
In [3]: f.coeff(x**2)
Out[3]: a
In [4]: f.coeff(x)
Out[4]: b
In [5]: f.coeff(1)
There is no way of telling the method to which variable the polynomial is
referrering, so of course it can't calculate the constant coefficient.
The ugly workaround currently is:
In [6]: cons = f - x**2*f.coeff(x**2) - x*f.coeff(x); cons
Out[6]: c
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