vandermonde_interp_1d_test, a Fortran90 code which calls vandermonde_interp_1d(), which finds a polynomial interpolant to data by setting up and solving a linear system involving the Vandermonde matrix, writing graphics files for processing by gnuplot.
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vandermonde_interp_1d, a Fortran90 code which finds a polynomial interpolant to data y(x) of a 1D argument, by setting up and solving a linear system for the polynomial coefficients, involving the vandermonde matrix, creating graphics files for processing by gnuplot().
The test program makes files which can be used by GNUPLOT to create PNG plots:
