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Diffstat (limited to 'numpy/polynomial/polytemplate.py')
| -rw-r--r-- | numpy/polynomial/polytemplate.py | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/numpy/polynomial/polytemplate.py b/numpy/polynomial/polytemplate.py index bf94d28ec..706f22c2d 100644 --- a/numpy/polynomial/polytemplate.py +++ b/numpy/polynomial/polytemplate.py @@ -304,9 +304,42 @@ class $name(pu.PolyBase) : # def degree(self) : - """The degree of the series.""" + """The degree of the series. + + Notes + ----- + .. versionadded:: 2.0.0 + + """ return len(self) - 1 + def reduce(self, deg) : + """Reduce the degree of the series. + + Reduce the degree of the $name series to `deg` by discarding the + high order terms. If `deg` is greater than the current degree a + copy of the current series is returned. This can be useful in least + squares where the coefficients of the high degree terms may be very + small. + + Parameters: + ----------- + deg : non-negative int + The series is reduced to degree `deg` by discarding the high + order terms. The value of `deg` must be a non-negative integer. + + Returns: + ------- + new_instance : $name + New instance of $name with reduced degree. + + Notes + ----- + .. versionadded:: 2.0.0 + + """ + return self.truncate(deg + 1) + def convert(self, domain=None, kind=None) : """Convert to different class and/or domain. |