E02ACF

Minimax curve fit by polynomials 
E02ADF

Leastsquares curve fit, by polynomials, arbitrary data points 
E02AFF

Leastsquares polynomial fit, special data points (including interpolation) 
E02AGF

Leastsquares polynomial fit, values and derivatives may be constrained, arbitrary data points 
E02BAF

Leastsquares curve cubic spline fit (including interpolation) 
E02BEF

Leastsquares cubic spline curve fit, automatic knot placement 
E02CAF

Leastsquares surface fit by polynomials, data on lines 
E02DAF

Leastsquares surface fit, bicubic splines 
E02DCF

Leastsquares surface fit by bicubic splines with automatic knot placement, data on rectangular grid 
E02DDF

Leastsquares surface fit by bicubic splines with automatic knot placement, scattered data 
G08CGF

Performs the χ^{2} goodness of fit test, for standard continuous distributions

G10ABF

Fit cubic smoothing spline, smoothing parameter given 
G10ACF

Fit cubic smoothing spline, smoothing parameter estimated 