On Dec 2, 2009, at 8:58 PM, Peng Yu wrote: > To debug a function, what I currently know is to put 'browser()' in > it. But I'm wondering if there is a way like 'step in' that is > available in debuggers of other languages (e.g. gdb). Learn to search: > library(sos) > ???"debug step" -- David Winsemius, MD Heritage Laboratories West Hartford, CT