

pbeta($x, $a, $b), qbeta($p, $a, $b)  Generates cumulative probabilities and quantiles from the Beta distribution. $x should be in the range of [0,1] and $p should be in [0,1]. $a and $b are parameters of the beta distribution. Both $a and $b must be in the range [0,Inf). 
pchisq($x, $df, $ncp), qbeta($p, $df, $ncp)  Generates cumulative probabilities and quantiles from the Chisquare distribution. $x should be in the range of [0,Inf) and $p should be in [0,1]. $df is the degrees of freedom of the distribution and must be in the range (0,Inf). $ncp is the optional noncentrality parameter and must be in the range [0,Inf). The noncentrality parameter need not be specified and the calls pchisq(5, 5, 0.0) and pchisq(5, 5) will return identical values. 
pf($x, $dfn, $dfd, $ncp), qf($p, $dfn, $dfd, $ncp)  Generates cumulative probabilities and quantiles from the F distribution. $x should be in the range of [0,Inf) and $p should be in [0,1]. $dfn and $dfd are the numerator and denominator degrees of freedom, respectively. Both must be in the range (0,Inf). $ncp is the optional noncentrality parameter and must be in the range [0,Inf). The noncentrality parameter need not be specified and the calls [CS]<pf(5, 2, 3, 0.0)> and [CS]<pf(5, 2, 3)> will return identical values. 
pgamma($x, $shape, $scale), qgamma($p, $shape, $scale)  Generates cumulative probabilities and quantiles from the Gamma distribution. The gamma density is proportional to [CS]<$x**($shape  1) * EXP( $scale * $x)> $x should be in the range of [0,Inf) and $p should be in [0,1]. $shape and $scale are parameters of the Gamma distribution and both must be in the range (0,Inf). 
pnorm($x), qnorm($p)  Generates cumulative probabilities and quantiles from the standard Normal distribution. $x should be in the range of (Inf,Inf) and $p should be in [0,1]. 
ppois($x, $lambda), qpois($p, $lambda)  Generates cumulative probabilities and quantiles from the Poisson distribution. $x should be in the range of [0,Inf) and $p should be in [0,1]. $lambda is the parameter of the Poisson distribution and must be in the range [0,Inf). 
pt($x, $df, $ncp), qt($p, $df, $ncp)  Generates cumulative probabilities and quantiles from the T distribution. $x should be in the range of (Inf,Inf) and $p should be in [0,1]. $df is the degree of freedom of the distribution and must be in the range (0,Inf). $ncp is the optional noncentrality parameter and must be in the range (Inf,Inf). The noncentrality parameter need not be specified and the calls [CS]<pt(0, 3, 0.0)> and [CS]<pt(0, 3)> will return identical values. 
pbinom($x, $n, $p)  Generates cumulative probabilities from the Binomial distribution. This is the probability of having $x or fewer successes in $n trials when each trial has a $p probability of success. $x should be in the range of [0,$n], $n should be in the range (0,Inf) and $p should be in [0,1]. 
pnbinom($x, $n, $p)  Generates cumulative probabilities from the Negative Binomial distribution. The is the probability of having $x or fewer failures before the $n’th success when each trial has a $p probability of success. $x should be in the range of [0,Inf), $n should be in the range (0,Inf) and $p should be in [0,1]. 
DCDFLIB is a library of C routines for cumulative distribution functions, inverses, and other parameters written by Barry W. Brown, James Lovato and Kathy Russell of the Department of Biomathematics at The University of Texas M.D. Anderson Cancer Center in Houston Texas.Version 1.1 of DCDFLIB is included with this distribution and can be downloaded via ftp from odin.mda.uth.tmc.edu as /pub/src/dcdflib.c1.1.tar.gz. The library is also available in Fortran source.
Documentation for DCDFLIB is found in the cdflib/doc/ directory of the source distribution of Math::CDF
DCDFLIB has been put in the public domain. However, some of the Algorithms are from the ACM publication and is under their copyright. Generally this means that those algorithms can be distributed and used freely for noncommercial purposes. See the file cdflib/doc/README in the source distribution of Math::CDF for more information.
o Math::CDF was put together by Ed Callahan, callahan@envstat.com Environmental Statistics PO Box 563 Fountain City, WI 54629
o DCDFLIB was written by Barry W. Brown (bwb@odin.mdacc.tmc.edu), James Lovato and Kathy Russell Department of Biomathematics, Box 237 The University of Texas, M.D. Anderson Cancer Center 1515 Holcombe Boulevard Houston, TX 77030
Math::Random, Statistics::ChiSquare, Statistics::OLS
perl v5.20.3  CDF (3)  20000117 
Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.