xinterpn

MATLAB

y  = xinterpn(m, x, xi)

Description

Perform n-dimensional linear interpolation in very much the same manner as the Matlab function interpn. If this function is called one interpolation point at a time, interpolation will occur approximately three times faster than the native Matlab implementation. If a matrix of interpolation points is provided to this function, the speed advantage will increase beyond a factor of three.

Parameters

Parameters	Description
m [matrix]	Data table to be interpolated.
x [cell]	Cell array with the axes for the table. Each cell must contain a vector whose length matches the corresponding dimension size of the data table, m.
xi [matrix]	Interpolation points. This matrix must be N by # of dimensions in table, m, where N is the number of returned interpolation points.

Return Values

Return Values	Description
y [vector]	Vector (Nx1) of Interpolated values.

Examples

m = rand(10, 20, 30, 40);
x = { [ 1:10 ], [ 1:20 ], [ 1:30 ], [ 1:40 ] };
xi = [ 1 2 3 4; 5 6 7 8 ];
y = xinterpn(m, x, xi)

Group

General Utility Functions

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