> Is there then a reason that overriding the check.names default is forbidden > from cbind? I can't tell why this would be the case.
For the same reason you can't have data.frame(x=1:10, x=11:20, check.names=TRUE, check.names=FALSE) or mean(x=1:10, x=11:20) i.e, you can't generally pass the same argument more than once. There are exceptions to this, e.g., sum(c(NA, 1:10), na.rm=TRUE, na.rm=FALSE) but in general each argument can only be matched once. Since cbind.data.frame calls data.frame with check.names=FALSE, you can't supply it again. Best, Ista > > Thanks > Yikes, no. As I mentioned to the SO poster, I get that bit. I meant what is the design principle behind check.names being hardcoded to FALSE. I see no conflict with the purpose of cbind from the ability to specify check.names at the level of cbind. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
