/usr/include/htslib/kfunc.h is in libhts-dev 1.7-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright (C) 2010, 2013 Genome Research Ltd.
Copyright (C) 2011 Attractive Chaos <attractor@live.co.uk>
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#ifndef HTSLIB_KFUNC_H
#define HTSLIB_KFUNC_H
#ifdef __cplusplus
extern "C" {
#endif
/* Log gamma function
* \log{\Gamma(z)}
* AS245, 2nd algorithm, http://lib.stat.cmu.edu/apstat/245
*/
double kf_lgamma(double z);
/* complementary error function
* \frac{2}{\sqrt{\pi}} \int_x^{\infty} e^{-t^2} dt
* AS66, 2nd algorithm, http://lib.stat.cmu.edu/apstat/66
*/
double kf_erfc(double x);
/* The following computes regularized incomplete gamma functions.
* Formulas are taken from Wiki, with additional input from Numerical
* Recipes in C (for modified Lentz's algorithm) and AS245
* (http://lib.stat.cmu.edu/apstat/245).
*
* A good online calculator is available at:
*
* http://www.danielsoper.com/statcalc/calc23.aspx
*
* It calculates upper incomplete gamma function, which equals
* kf_gammaq(s,z)*tgamma(s).
*/
double kf_gammap(double s, double z);
double kf_gammaq(double s, double z);
/* Regularized incomplete beta function. The method is taken from
* Numerical Recipe in C, 2nd edition, section 6.4. The following web
* page calculates the incomplete beta function, which equals
* kf_betai(a,b,x) * gamma(a) * gamma(b) / gamma(a+b):
*
* http://www.danielsoper.com/statcalc/calc36.aspx
*/
double kf_betai(double a, double b, double x);
/*
* n11 n12 | n1_
* n21 n22 | n2_
* -----------+----
* n_1 n_2 | n
*/
double kt_fisher_exact(int n11, int n12, int n21, int n22, double *_left, double *_right, double *two);
#ifdef __cplusplus
}
#endif
#endif
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