disregard my last question. i forgot that d1 was a dataframe and was thinkiing it was a vector. i think i can fix what i was doing now.



On Fri, Dec 12, 2008 at  8:52 PM, markle...@verizon.net wrote:

could someone explain what is happening below ? I was trying to solve a related question on the list and then , as I was solving it, I was getting strange answers and then I noticed below. It's obviously not a bug but I don't get it. Thanks.

m <- data.frame(class = c("birds", "planes"), feather = c(1,3), jet = c(2,4))
d1 <- data.frame(jet = c(10), feather = c(20))

print(m)
m[,-1]*2       # THIS IS FINE
m[,"jet"]*2     # THIS IS FINE


print(d1["jet"]) # THIS IS FINE
m[,"jet"]*d1["jet"] # THIS IS ODD

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