**test_values**,
a Python code which
supplies test values of various mathematical functions, including
Abramowitz, AGM, Airy, Bell, Bernoulli, Bessel, Beta, Binomial,
Bivariate Normal, Catalan, Cauchy, Chebyshev, Chi Square, Clausen,
Clebsch Gordan, Collatz, Cosine integral, Dawson, Debye, Dedekind,
dilogarithm, Exponential integral, Elliptic, Error, Euler, Exponential
integral, F probability, Fresnel, Frobenius, Gamma, Gegenbauer,
Goodwin, Gudermannian, Harmonic, Hermite, Hypergeometric, inverse
trigonometic, Jacobi, Julian Ephemeris Date, Kelvin, Laguerre,
Lambert W, Laplace, Legendre, Lerch, Lobachevsky, Lobatto,
Logarithmic integral,
Log normal, McNugget numbers, Mertens, Mittag-Leffler, Moebius,
Multinomial, Negative binomial, Nine J, Normal, Omega, Owen, Partition,
Phi, Pi, Poisson, Polylogarithm, Polyomino, Prime, Psi, Rayleigh,
Hyperbolic Sine integral, Sigma, Sine Power integral, Sine integral,
Six J, Sphere area, Sphere volume, Spherical harmonic, Stirling,
Stromgen, Struve, Student, Subfactorial, Student probability, Three J,
Transport, Trigamma, Truncated normal, van der Corput, von Mises,
Weibull, Wright omega, Zeta.

The intent is to provide a means of making very simple tests for correctness of software designed to compute a variety of functions. The testing can be done automatically. The data provided is generally skimpy, and might not test the algorithm over a suitably wide range. It does, however, provide a small amount of reassurance that a given computation is (or is not) computing the appropriate quantity, and doing so reasonably accurately.

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

**test_values** is available in
a C version and
a C++ version and
a Fortran90 version and
a MATLAB version and
an Octave version and
a Python version and
an R version.

fn, a Python code which approximates elementary and special functions using Chebyshev polynomials; functions include Airy, Bessel I, Bessel J, Bessel K, Bessel Y, beta, confluent hypergeometric, cosine integral, Dawson's integral, digamma (psi), error, exponential integral, gamma, hyperbolic cosine integral, hyperbolic sine integral, incomplete gamma, log gamma, logarithmic integral, Pochhammer, psi, sine integral, Spence; by Wayne Fullerton.

- test_values.py, the source code.
- test_values.sh, runs all the tests.
- test_values.txt, the output file.