specfun_test, a Fortran77 code which calls specfun(), which evaluates special functions, including Bessel I, J, K and Y functions, Dawson Integral, Error (Erf), Exponential Integral (E1 and EI), Gamma, log Gamma, and Psi/Digamma, by William Cody and Laura Stoltz;
The computer code and data files described and made available on this web page are distributed under the MIT license.
specfun, a Fortran77 code which evaluates special functions, including Bessel I, J, K and Y functions, Dawson Integral, Error (Erf), Exponential Integral (E1 and EI), Gamma, log Gamma, and Psi/Digamma, by William Cody and Laura Stoltz;
SPECFUN_test1 makes some sophisticated accuracy checks.
SPECFUN_test2 compares computed results to tables of values.