Gregg,
What about
A<-data.frame(1,1,1); names(A)=letters[1:3] ; B<-matrix(0,2,3)
B<-as.data.frame(B)
names(B)<-names(A)
rbind(A,B)
-Cody
Gregg Lind
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Subject
[R] Rbind with data frames --
03/05/2007 02:06 column names question
PM
As part of my work, I am trying to append matrices onto data frames.
Naively I assumed that when rbinding a data.frame and matrix, the matrix
would be coerced and appended, keeping the names from the data frame.
Clearly, I am not fully understanding the process by which rbind works.
Example code:
> A<-data.frame(1,1,1); names(A)=letters[1:3] ; B<-matrix(0,2,3)
> rbind(A,B)
Error in match.names(clabs, names(xi)) : names do not match previous names:
V1, V2, V3
> rbind(A,as.data.frame(B))
Error in match.names(clabs, names(xi)) : names do not match previous names:
V1, V2, V3
Is there a "right" way to combine the two such that the both end up
having the same column names?
I have tried to understand the deparse.level argument of rbind, but it
doesn't seem to do what I'm asking.
Thank you for any help you can give.
Gregg
--
Gregg Lind, M.S.
Division of Epidemiology and Community Health
School of Public Health
University of Minnesota, United States
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