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Module « scipy.interpolate »

Fonction bisplev - module scipy.interpolate

Signature de la fonction bisplev

def bisplev(x, y, tck, dx=0, dy=0) 

Description

help(scipy.interpolate.bisplev)

Evaluate a bivariate B-spline and its derivatives.

Return a rank-2 array of spline function values (or spline derivative
values) at points given by the cross-product of the rank-1 arrays `x` and
`y`.  In special cases, return an array or just a float if either `x` or
`y` or both are floats.  Based on BISPEV and PARDER from FITPACK.

Parameters
----------
x, y : ndarray
    Rank-1 arrays specifying the domain over which to evaluate the
    spline or its derivative.
tck : tuple
    A sequence of length 5 returned by `bisplrep` containing the knot
    locations, the coefficients, and the degree of the spline:
    [tx, ty, c, kx, ky].
dx, dy : int, optional
    The orders of the partial derivatives in `x` and `y` respectively.

Returns
-------
vals : ndarray
    The B-spline or its derivative evaluated over the set formed by
    the cross-product of `x` and `y`.

See Also
--------
splprep, splrep, splint, sproot, splev
UnivariateSpline, BivariateSpline

Notes
-----
    See `bisplrep` to generate the `tck` representation.

References
----------
.. [1] Dierckx P. : An algorithm for surface fitting
   with spline functions
   Ima J. Numer. Anal. 1 (1981) 267-283.
.. [2] Dierckx P. : An algorithm for surface fitting
   with spline functions
   report tw50, Dept. Computer Science,K.U.Leuven, 1980.
.. [3] Dierckx P. : Curve and surface fitting with splines,
   Monographs on Numerical Analysis, Oxford University Press, 1993.

Examples
--------
Examples are given :ref:`in the tutorial <tutorial-interpolate_2d_spline>`.

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