Full_Name: Marc Mamin Version: 1.8, 2.0.0 OS: Windows & Linux Submission from: (NULL) (217.17.202.254)
[snipped issues previously responded to]
Here another example that underline how problematic this issue can be:
aa1<-1 aa2<-2 df<-as.data.frame(aa1,aa2) > df$aa [1] 1 (only the first matching column is retrieved)
Actually, the above commands constructed a data frame with one column (the second argument to 'as.data.frame' is 'row.names'):
> aa1<-1 > aa2<-2 > df <- as.data.frame(aa1,aa2) > df aa1 2 1 > dim(df) [1] 1 1
When a data frame (or list) does have columns whose names have common prefixes, the behavior is as documented (NULL is returned):
> df2 <- data.frame(aa1, aa2) > df2 aa1 aa2 1 1 2 > df2$aa NULL >
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