drop observations
On Dec 30, 2010, at 4:54 PM, Charl?ne Cosandier wrote:
Hi, I want to drop observations with value 0 from my data.frame "dta" for each of the two variables "c01" and "ctotale". How can I do that? Thanks
subset(dta, !( c01==0 | ctotale==0) ) ... remembering of course to assign this result to some appropriately named object.
Charl?ne Lisa Cosandier [[alternative HTML version deleted]]
-- David Winsemius, MD West Hartford, CT