Interpolation

1. Cubic Spline Interpolation
2. Neville's Polynomial Interpolation
3. Linear curvefit
4. Polynomial 2nd order
5. Polynomial 3rd order
6. Polynomial 4th order

Demo

Results:

Depiction of f(x):

ERROR LIST

• -9997 : Point not in range.
• -9996 : Number of points less than 4 (or greater than MAXSET)
• -9995 : Solution not converging in Newton Raphson's method
• -9994 : Set of equations in not diagonally dominant (or 0 element in matrix)
• -9993 : Linear backfit undefined for constant function. f(x) = c

Note

Folder 'PlotGraphs' contains different files created using Code::Blocks, among which Plotter.cpb must be chosen. The folder 'Resources' contains the WinBGI for displaying the plots generated. The file PLOTTER.cpb must be opened in Code::Blocks.

The function plotCurve(int n){...} is where the actual Graphics is implemented. To generate a specific curve, lines could be commented out where putpixel(...) functions are called.