Full_Name: M Welinder Version: 1.9 OS: Solaris Submission from: (NULL) (65.213.85.218) pbeta has known accuracy and efficiency problems as noted in the code. Gnumeric 1.3.1 is now out and features a new implementation of pbeta (with R's calling conventions). The code is thanks to Ian Smith and lives in src/mathfunc.c I know of no problematic arguments. Gnumeric uses "gnm_float" where R uses "double", but this should all be easily fixable with a little search-and-replace. This should facilitate improved qbeta, pt, pbinom [bug 5727], pnbinom, pf, and whatever those drag with them. Slight care will be needed to avoid squeezing pbeta's first argument up against 1, see Gnumeric's pf function, for example.