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2009-07-19 Brian Gough <bjg@network-theory.co.uk>
* gumbel1.c (gsl_cdf_gumbel1_Q): use a single argument ax-log(b)
to get better control over underflow/overflow
2008-12-03 Brian Gough <bjg@network-theory.co.uk>
* gammainv.c (gsl_cdf_gamma_Pinv): keep iterating if P is still
changing (fix for bug 24704)
* test.c (test_chisqinv): added test cases for bug 24704
2008-07-03 Brian Gough <bjg@hp2.network-theory.co.uk>
* Makefile.am (INCLUDES): use top_srcdir instead of top_builddir
2008-04-29 Brian Gough <bjg@network-theory.co.uk>
* gammainv.c (gsl_cdf_gamma_Pinv, gsl_cdf_gamma_Qinv): restrict
the range of the gaussian approximation
2008-02-20 Brian Gough <bjg@network-theory.co.uk>
* beta_inc.c (beta_inc_AXPY): add some handling for large
parameter cases
2008-02-12 Brian Gough <bjg@network-theory.co.uk>
* hypergeometric.c (gsl_cdf_hypergeometric_P): compute midpoint in
double precision to avoid overflow
(gsl_cdf_hypergeometric_Q): ditto
2007-08-22 Brian Gough <bjg@network-theory.co.uk>
* betainv.c (gsl_cdf_beta_Pinv): added an error check for
inaccurate results
* gammainv.c (gsl_cdf_gamma_Pinv): added an error check for
inaccurate results
* tdistinv.c (gsl_cdf_tdist_Pinv): added an error check for
inaccurate results
2007-08-21 Brian Gough <bjg@network-theory.co.uk>
* betainv.c (gsl_cdf_beta_Pinv): added bisection method to improve
initial approximations
2007-01-23 Brian Gough <bjg@network-theory.co.uk>
* betainv.c (gsl_cdf_beta_Pinv): avoid generating a NaN for lx > 0
2006-04-18 Brian Gough <bjg@network-theory.co.uk>
* betainv.c (gsl_cdf_beta_Qinv): fix prototype const
2006-03-07 Brian Gough <bjg@network-theory.co.uk>
* poisson.c: added poisson cdf
* nbinomial.c: added negative binomial cdf
* hypergeometric.c: added hypergeometric cdf
* geometric.c: added geometric cdf
* binomial.c (gsl_cdf_binomial_Q): added binomial cdf
* test.c: added discrete function tests
* gamma.c (gsl_cdf_gamma_P, gsl_cdf_gamma_Q): clean up unused
code, ensure that branches make P+Q=1 always true
* fdistinv.c (gsl_cdf_fdist_Pinv): use P instead of p for consistency
* fdist.c (gsl_cdf_fdist_Q): use Q instead of P for consistency
* beta.c (gsl_cdf_beta_Q): use Q instead of P for consistency
2006-02-27 Brian Gough <bjg@network-theory.co.uk>
* fdistinv.c (gsl_cdf_fdist_Pinv, gsl_cdf_fdist_Qinv): added
inverse functions
* betainv.c (gsl_cdf_beta_Pinv, gsl_cdf_beta_Qinv): added inverse
functions
* tdistinv.c (gsl_cdf_tdist_Qinv, gsl_cdf_tdist_Pinv): max 32
iterations, prevent infinite loop
* gammainv.c (gsl_cdf_gamma_Qinv, gsl_cdf_gamma_Pinv): max 32
iterations, prevent infinite loop
2005-06-20 Brian Gough <bjg@network-theory.co.uk>
* test.c: removed tests using subnormal values, since they tend to
fail when extended precision registers are not available.
2004-10-26 Brian Gough <bjg@network-theory.co.uk>
* exppow.c: added exppow distribution
2004-10-01 Brian Gough <bjg@network-theory.co.uk>
* beta.c (gsl_cdf_beta_P, gsl_cdf_beta_P): return consistent
results for out of range values.
2003-08-27 Brian Gough <bjg@network-theory.co.uk>
* gauss.c: use parentheses around constant macros to avoid -(-X)
being interpreted as --X
2003-07-27 Brian Gough <bjg@network-theory.co.uk>
* gumbel1.c (gsl_cdf_gumbel1_Q): use pow in place of exp since
compilers seem to handle overflow better in this case (perhaps
because it is not an intrinsic function).
* gumbel2.c (gsl_cdf_gumbel2_P): handle case of x = 0 explicitly
(gsl_cdf_gumbel2_Q): handle case of x = 0 explicitly
2003-07-22 Brian Gough <bjg@network-theory.co.uk>
* gamma.c (gsl_cdf_gamma_P): Peizer and Pratt approximation for
large a seems to be inaccurate in tails
(gsl_cdf_gamma_Q): Peizer and Pratt approximation for large a
seems to be inaccurate in tails
* test.c (main): added test for large a for gamma
* cauchyinv.c (gsl_cdf_cauchy_Qinv): corrected limiting value for
Q=1
* added Cumulative Distribution functions from savannah.gnu.org
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