numpy.polynomial.polynomial.polysub — NumPy v1.11 Manual (original) (raw)
numpy.polynomial.polynomial.polysub(c1, c2)[source]¶
Subtract one polynomial from another.
Returns the difference of two polynomials c1 - c2. The arguments are sequences of coefficients from lowest order term to highest, i.e., [1,2,3] represents the polynomial 1 + 2*x + 3*x**2.
| Parameters: | c1, c2 : array_like 1-D arrays of polynomial coefficients ordered from low to high. |
|---|---|
| Returns: | out : ndarray Of coefficients representing their difference. |
Examples
from numpy.polynomial import polynomial as P c1 = (1,2,3) c2 = (3,2,1) P.polysub(c1,c2) array([-2., 0., 2.]) P.polysub(c2,c1) # -P.polysub(c1,c2) array([ 2., 0., -2.])