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scripts default icon3D Data Interpolation (Scripts) Publisher's description

3D interpolation.

Syntax: ui=NewtFit(x,y,z,u,xi,yi,zi)

3D interpolation. It may be used where griddata3 fails to find a triangularization of the datagrid (x,y,z). The function uses a modified 4 point Newton interpolation formula for vector arguments in 3D instread of scalars used in 1D. The interpolation is performed for the 4 nearest neighbors for each point in the (xi,yi,zi).

u=u(x,y,z) is the data from which ui(xi,yi,zi) is interpolated x,y,z,u are vectors of same size and xi,yi,zi are also vectors. The fit is exact (u=ui) for points (xi,yi,zi) that coinside with data points (x,y,z). Note: NewtFit also delivers result for points outside the domain (i.e., extrapolation), but results may be inaccurate then.

%Example: Prepare data in random non-uniform grid

%Gridpoints to fit:


%compare and plot

System Requirements:

MATLAB 6.5 (R13)
Program Release Status: New Release
Program Install Support: Install and Uninstall

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