MATLAB: Interpolate data around a point

interpolation

Hy guys , I have a matrix of data on a grid. P=45*25 matrix lat=45*25 matrix long=45*25 matrix and I want to interpolate this data around a point inside the grid. Someone could help me plese? Thank you very much in advance.

Best Answer

interp2(lat,long,P,____)

Related Solutions

MATLAB: Determine the Z value of a 3D region for a given set of co-ordinates

the function interp2() will work. The example in the help/documentation is

[X,Y,V] = peaks(10); [Xq,Yq] = meshgrid(-3:.1:3,-3:.1:3);
        Vq = interp2(X,Y,V,Xq,Yq); mesh(Xq,Yq,Vq)

As you can see in the interp2 function it has the original X,Y,Z (or in this case V) and then the user defines the Xq and Yq points that are not on the original grid. the Xq and Yq can be a single XY pair to get the interpolated Z value.

MATLAB: Interpolation method (spline)

From the documentation:

'spline':

‘Spline interpolation using not-a-knot end conditions. The interpolated value at a query point is based on a cubic interpolation of the values at neighboring grid points in each respective dimension.’

It does not appear to be the same as 'cubic'. According to the documentation, 'cubic' is currently the same as 'pchip'.

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Related Solutions

MATLAB: Determine the Z value of a 3D region for a given set of co-ordinates

MATLAB: Interpolation method (spline)

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