lagrange interpolation and derivative

Version 1.0.0.0 (1,4 KB) von Geoff Wawrzyniak
This function performs the Lagrange interpolation of a function and its derivative.
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Aktualisiert 24. Aug 2006

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This function performs the Lagrange interpolation of a function (y) or its derivative (dy/dx).

usage:
y=lagrange(x,pointx,pointsy,0) or
dy=lagrange(x,pointx,pointsy,1) or
dy=lagrange(x,pointx,pointsy,2)

There are two ways to find the derivative. If dydx_on (varargin(4)) is set to 1, it will base the derivative on pointx and pointsy (y will be dy/dx). If dydx_on == 2, the derivative is based on the interpolated points.

pointsy can be an array.

This function can get slow for large amounts of control points. Also, make sure to have extra control points outside the region of interpolation interest if there are lots of control points.

Zitieren als

Geoff Wawrzyniak (2024). lagrange interpolation and derivative (https://www.mathworks.com/matlabcentral/fileexchange/11964-lagrange-interpolation-and-derivative), MATLAB Central File Exchange. Abgerufen.

Kompatibilität der MATLAB-Version
Erstellt mit R14SP2
Kompatibel mit allen Versionen
Plattform-Kompatibilität
Windows macOS Linux
Kategorien
Mehr zu Interpolation finden Sie in Help Center und MATLAB Answers
Quellenangaben

Inspiriert von: Lagrange polynomial interpolation

Inspiriert: Lagrange Interpolator Polynomial

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Version Veröffentlicht Versionshinweise
1.0.0.0

Found error in the description of input arguments. Polished up code per the code metrics.