This looks like a job for match().
vec = c("C", "A", "B")
dataDF = data.frame(A1 = c("B", "A", "C"), A2 = c(1,2,3))
dataDF[match(dataDF$A1,vec),]
A1 A2
3 C 3
2 A 2
1 B 1
-Don
At 10:36 PM -0500 12/1/09, Hao Cen wrote:
Hi,
I have a a vector and a data frame with two columns
vec = c("C", "A", "B")
dataDF = data.frame(A1 = c("B", "A", "C"), A2 = c(1,2,3))
I would like to sort the data frame by column A1 such that the order of
elements in A1 is as the same as in vec.
After the ordering, the data frame would be
A1 A2
C 3
A 2
B 1
Any suggestions would be appreciated.
Thanks in advance
Jeff
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---------------------------------
Don MacQueen
Lawrence Livermore National Laboratory
Livermore, CA, USA
925-423-1062
m...@llnl.gov
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