**differ_test**,
a C++ program which
calls differ() to
determine the finite difference coefficients necessary in order to
combine function values at known locations to compute an approximation
of given accuracy to a derivative of a given order.

The computer code and data files made available on this web page are distributed under the GNU LGPL license.

differ, a C++ library which determines the finite difference coefficients necessary in order to combine function values at known locations to compute an approximation of given accuracy to a derivative of a given order.

- differ_test.cpp, a sample calling program.
- differ_test.sh, runs all the tests.
- differ_test.txt, the output file.