of of of

Two procedures for numerical differentiation of tabular data are presented in this section:

I. Derivatives of unequally spaced data 2. Derivatives of equally space data

All of the subroutines are written for a quadratic polynomial. Higher-degree polynomials can be constructed by following the patterns of the quadratic polynomials. The variable ndeg, which specifies the degree of the polynomials, is thus not needed in the present programs. It is included, however, to facilitate the addition of other-degree polynomials to the subroutines, in which case the degree of the polynomial to be evaluated must be specified.