On May 13, 2010, at 5:34 AM, Dennis Murphy wrote:
Hi:
You've got to convert m to a data frame first:
Well, that would be one way, but it is not true that it is necessary.
The Details section of the help page for merge says that row,names is
an acceptable "by" specification, so without th
Hi:
You've got to convert m to a data frame first:
> m <- data.frame(m)
> m$nms <- rownames(m)
> merge(df, m, by.x = 'col1', by.y = 'row.names')
col1 col2.x col1 col2.y
1 kk 68 9
2 kk 38 9
HTH,
Dennis
On Wed, May 12, 2010 at 5:03 PM, Yuan Jian wrote:
> Hello,
Hello,
how to merge a data.frame and a matrix by one column in the data.frame and
rownames of the matrix?
df <- data.frame(col1=c("kk","yy","kk"),col2=c(6,4,3))
> df
col1 col2
1 kk 6
2 yy 4
3 kk 3
m<-matrix(c(3,8,56,9), nrow=2, dimnames = list(c("aa","kk"),c("col1","col2")))
> m
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