Potential bug in Gamma.quantile

Java library of statistical distribution

Brought to you by: robbyjo

Potential bug in Gamma.quantile

Forum: General Discussion

Creator: Roland Ewald

Created: 2013-08-15

Updated: 2013-12-18

Roland Ewald - 2013-08-15

Sorry to post this here, but the bug tracker does not seem to allow others to create new tickets.

There might be a problem in Gamma.quantile. It seems to work fine for most values, but not always.

For example:

Gamma.quantile(0.42, 617.0, 2.0, true, false)

yields 1206.088240779075, which differs from qgamma in R (3.0.1):

> qgamma(p=0.42,shape=617.0,scale=2.0,lower.tail=TRUE,log.p=FALSE) > 1223.334

Best regards,
Roland
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

Roby Joehanes - 2013-12-18

I am sorry that I did not notice this error for quite some time. This turns out a bug in Normal.cumulative function. Fixed in version 0.0.8.

I put the ticket here:
https://sourceforge.net/p/jdistlib/tickets/6/

If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

Roby Joehanes - 2013-12-18

Now I figured out how to allow people to post tickets.

If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

Log in to post a comment.