lagrange interpolation and derivative

Versione 1.0.0.0 (1,4 KB) da Geoff Wawrzyniak
This function performs the Lagrange interpolation of a function and its derivative.
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Aggiornato 24 ago 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.

Cita come

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

Compatibilità della release di MATLAB
Creato con R14SP2
Compatibile con qualsiasi release
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Versione Pubblicato Note della release
1.0.0.0

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