Full_Name: Jerry W. Lewis Version: 2.6.2 OS: Windows XP Professional Submission from: (NULL) (96.233.108.117)
Currently, beta(a,b) returns NaN if either a or b is negative, but the current calculation beta(a,b) = gamma(a)*gamma(b)/gamma(a+b) works equally well if either or both arguments are negative, provided that none of a, b, a+b is a negative integer. Also, if n>m>0 are integers, then B(m,-n) = (-1)^m * B(m,n-m+1) ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
