On Jul 4, 2012, at 03:12 , Michael Braun wrote: > I just upgraded to R 2.15.1, and I am getting a segmentation fault when using > the rWishart function (from the stats package) to sample moderately-size > matrices. > > Here is the output when I run R within gdb. 720 appears to be the > dimensionality cut-off. Anything smaller works fine. Anything larger > crashes. > >> x=rWishart(1,700,diag(700)) // this works >> x=rWishart(1,720,diag(720)) > Error: C stack usage is too close to the limit >> x=rWishart(1,722,diag(722)) >
That'll be due to allocating memory off the C stack with alloca(). Please file a bug report on this (nothing to do with Mac, much less with the age of your computer). In a tight spot, you can run R from the terminal after raising the C stack limit with, say, "ulimit -s 32768", but of course the trouble returns at twice the matrix size. Notice that there are really two issues here. One is that the R_CheckStack() safeguards are failing. The other is why we're using stack allocation in the first place. -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd....@cbs.dk Priv: pda...@gmail.com _______________________________________________ R-SIG-Mac mailing list R-SIG-Mac@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-mac
