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Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: get coefficients from a symbolic polynomial
Replies: 6   Last Post: Jan 5, 2013 5:49 PM

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Qiming

Posts: 10
Registered: 12/21/12
get coefficients from a symbolic polynomial
Posted: Jan 5, 2013 10:49 AM
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Hi all:

I have a question of how to get coefficients from a symbolic polynomial.

Suppose the polynomial is "y=x+2x^2+3x^3", we want the result to be: [0,1,2,3];

Note that the entire polynomial is symbolic, that is, even the coefficients 0, 1, 2, 3 are in symbolic form instead of numbers, so I cannot use 'sym2poly(y)' to get the coefficients.

I think one possible way is to convert the symbolic into strings, but I test some functions, none of them work.

How to do this?

Any help is appreciated.

Qiming

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