Have you looked at the merge() function?
Here is an example. I don't know if it resembles your problem.
> M1 <- data.frame(V1=letters[1:3], V2=LETTERS[26:24], N1=101:103)
> M2 <- data.frame(V1=letters[c(3,1,2,3,2)],
V2=LETTERS[c(23,26,22,24,24)], N2=c(1003,1001,1002,1003,1002))
> merge(M
Below...
On Mon, 8 Dec 2014, David Lambert wrote:
I have 2 data frames, M1[n,20] and M2[m,30].
What does this mean? It might be intended to convey matrix dimensions, but
these are not matrices and that is not R syntax.
If V1 and V2 are the same in both M1 and M2, then append V3-V30 from M
I have 2 data frames, M1[n,20] and M2[m,30].
If V1 and V2 are the same in both M1 and M2, then append V3-V30 from M2 onto M1.
Otherwise, continue searching for a match.
M1 is complete for all V1 and V2. M2 is missing observations for V1 or V2, or
both.
I can't figure this one out, except
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