names error message
Hi Julie,
On Mon, Dec 2, 2013 at 3:38 PM, Julie Royster <jsdroyster at nc.rr.com> wrote:
Hello wise R folks, I ran a job to combine 2 dataframes using rbind. I received this error message that the names were not the same Error in match.names(clabs,names(xi)): names do not match previous names BUT when I entered this statement Identical (names(data1[[1]]),names(data2[[2]]) )
I'm not sure what you think you're comparing here:
data1 <- data.frame(a=1:3, b=4:6, c=7:9)
data2 <- data.frame(A=11:13, B=14:16, C=17:19)
row.names(data1) <- c("A", "B", "C")
identical (names(data1[[1]]),names(data2[[2]]) )
[1] TRUE I initially thought you were comparing row names to column names, but that's also not right. Instead you're taking the first list element of data1 and comparing its name to that of the second list element of data2, but extracting them in a way that removes the names:
data1[[1]]
[1] 1 2 3
data2[[2]]
[1] 14 15 16
names(data1[[1]])
NULL
names(data2[[2]])
NULL Compared to:
names(data1[1])
[1] "a"
names(data2[2])
[1] "B" Instead, you need to look at the column names of each, which are most conveniently accessed with colnames(data1) and colnames(data2)
R responded TRUE to this query, indicating the names are identical So I am baffled. visually checking each dataset using str they look the same, and R says they are the same when queried, But I still get the error when I give this command newname <- rbind (data1,data2) Any ideas?
Best idea of all: provide a reproducible example, because otherwise there's no way to tell. dput(head(data1)) and dput(head(data2)) and paste that into your email. Sarha
Sarah Goslee http://www.functionaldiversity.org