[Maxima] RFC: extracting coefficients of a multivariate polynomial
andre.maute at gmx.de
Mon Apr 28 03:13:53 CDT 2008
>>Well, this is quite a different problem. If you need all the coefficients,
>>why did you provide a list of the exponent vectors?
>>You computed a huge list that was not necessary.
the degrees in exps are also the appearing monomials in the polynomial,
>>Could you tell us what is it that you are doing with the coefficients?
I use maxima to generate polynomial shape functions
for my finite element code (C++).
I need the coefficients for generating a horner scheme (C++ Code),
>>I am guessing that what you are doing could be done directly on the
>>polynomial, and the
>>extraction of the coefficients is unnecessary.
The C++ Code has to evaluate the polynomials,
so I have to teach my C++ Code how the polynomials are to be evaluated.
And as I pointed out earlier this is done *once*,
e.g when I add new polynomial shape function systems.
This is only a maintainment optimization for me.
At the moment I don't want to investigate this further.
I only thought there could be a drop-in replacement
for my function 'my_coeff' in maxima.
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