pwtools.num.PolyFit1D.get_root¶
- PolyFit1D.get_root(x0=None, xab=None, **kwds)¶
Return x where y(x) = 0 by calculating the root of the fit function.
In
Spline
, this is the same asSpline.invsplev(0.0, ...)
, i.e. lookup x where y=0, which is exactly the root.- Parameters:
xab (x0 or) – see
_findroot()
**kwds – passed to
_findroot()
- Returns:
xx – y(xx) = 0
- Return type:
scalar