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Compute the value of Lagrange polynomial at given points

version 1.4 (1.99 KB) by

The function computes the value of a Lagrange polynomial with mesh points x and mesh values y.



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The function is implemented based on Barycentric method. The code is vectorized for fast speed. The mesh points x is a row vector. The mesh value y is a matrix, with each row representing the mesh values of a polynomial. y(i,j) is the value of the i'th polynomial at mesh points j. The return value p is a matrix, with p(i,j) to be the value of the i'th polynomial at points t(j)

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Change the 'equal' between two double precision numbers to 'approximate equal'. Replace all 'repmat' to 'bsxfun' to speed up computation


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MATLAB Release
MATLAB 7.12 (R2011a)
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