vandermonde_interp_2d_test, a Fortran90 code which calls vandermonde_interp_2d(), which finds P(X,Y), a polynomial interpolant to data Z(X,Y) which depends on two independent variables X and Y, by setting up and solving a linear system involving the Vandermonde matrix.
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vandermonde_interp_2d, a Fortran90 code which finds a polynomial interpolant to data z(x,y) of a 2D argument by setting up and solving a linear system for the polynomial coefficients, involving the vandermonde matrix.