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| author | e-q <eric.antonio.quintero@gmail.com> | 2016-04-12 11:26:05 -0700 |
|---|---|---|
| committer | Charles Harris <charlesr.harris@gmail.com> | 2016-06-12 12:08:54 -0600 |
| commit | 76e2d4751294077cc4cafe155571ead8213133a8 (patch) | |
| tree | 3a449a0337c637f1983a7570a3347ccfdaa7c347 /doc/source | |
| parent | 76c27b5d2a28657062b2dcebba062f1941e4955f (diff) | |
| download | numpy-76e2d4751294077cc4cafe155571ead8213133a8.tar.gz | |
ENH: Add `polyrootval` to numpy.polynomial
As one can easily encounter when working with high-order signal processing
filters, converting a high-order polynomial from its roots to its polynomial
coefficients can be quite lossy, leading to inaccuracies in the filter's
properties.
This PR adds a new function, `polyrootval` - based on `polyval` - that
evaluates a polynomial given a list of its roots. The benefit of calculating it
this way can be seen at scipy/scipy:6059. Some tests are included, as well.
Diffstat (limited to 'doc/source')
| -rw-r--r-- | doc/source/reference/routines.polynomials.polynomial.rst | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/doc/source/reference/routines.polynomials.polynomial.rst b/doc/source/reference/routines.polynomials.polynomial.rst index 431856622..8194ca867 100644 --- a/doc/source/reference/routines.polynomials.polynomial.rst +++ b/doc/source/reference/routines.polynomials.polynomial.rst @@ -32,6 +32,7 @@ Basics polygrid3d polyroots polyfromroots + polyvalfromroots Fitting ------- |