SplineCurvFit software was developed to satisfy user requirements, that the curve fit pass thru all data points. The program uses the cubic spline curve fit method for a single curve, y = a0 + a1x + a2x^2 + a3x^3, and determines all the coefficients that define the curve. Also determined are the maximum and minimum along the curve fit, where the slope is zero. The program can handle as many as 400 data points.

Spline5thOrder software provides yet another method for spline curve fitting data. The 5th order quartic equation is of the form y = a0 + a1x + a2x^2 + a3x^3 + a4x^4.

Spline6thOrder software provides 6th order capability for spline curve fitting data. The 6th order form of the equation is y = a0 + a1x + a2x^2 + a3x^3 + a4x^4 + a5x^5.

Spline Curve Fit Programs 1 & 2, for multple curves, y = f (x,z), are included in link Other Software (Spline Curve Fit 2D & 3D Computer Programs).