bugGNU Scientific Library - Bugs: bug #42502, wrong results of the function...


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bug #42502: wrong results of the function gsl_cdf_ugaussian_Pinv

Submitted by:  Patrick Alken <psa>
Submitted on:  Tue 03 Jun 2014 06:51:52 PM UTC  
Category: Runtime errorSeverity: 3 - Normal
Operating System: Status: None
Assigned to: NoneOpen/Closed: Open

Tue 03 Jun 2014 06:51:52 PM UTC, original submission:

#include <gsl/gsl_math.h>
#include <stdio.h>

int main(){
double x= 0.5;
double res = gsl_cdf_ugaussian_Pinv(x);
return 0;

For some reason the output is: icdf(0.500000)=1.000000

Which is wrong, it should be: icdf(0.500000)=0.000000 (because P(X<0)=0.5)

submitted by dafna3 =at= gmail.com

Patrick Alken <psa>
Project Administrator


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