[Help-gsl] gsl_cdf_chisq_P does not work?

[Paul van Hoven]

I'm trying to use the chi2 cdf function (Function: double 
gsl_cdf_chisq_P (double x, double nu)). When I try to use it I get the 
following error message on compiling:

g++ -I./gtest-1.5.0/include -lgsl -g -Wall -Wextra -c 
./RandomNumberGenerator.cpp
./RandomNumberGenerator.cpp: In member function ‘double 
RandomNumberGenerator::chiSquareCDF(double, double)’:
./RandomNumberGenerator.cpp:49: error: ‘gsl_cdf_chisq_P’ was not 
declared in this scope
make: *** [RandomNumberGenerator.o] Error 1


I also use other GSL function e.g. "gsl_ran_poisson_pdf" and they work 
fine.

Why can't I use "gsl_cdf_chisq_P"?

Paul