sym2poly (Symbolic Math Toolbox)

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Symbolic-to-numeric polynomial conversion.

Syntax

c = sym2poly(s)

Description

sym2poly returns a row vector containing the numeric coefficients of a symbolic polynomial. The coefficients are ordered in descending powers of the polynomial's independent variable. In other words, the vector's first entry contains the coefficient of the polynomial's highest term; the second entry, the coefficient of the second highest term; and so on.

Examples

The commands

syms x u v;
sym2poly(x^3 - 2*x - 5)

return

1     0    -2    -5

while sym2poly(u^4 - 3 + 5*u^2) returns

1     0     5     0    -3

and sym2poly(sin(pi/6)*v + exp(1)*v^2) returns

2.7183    0.5000         0