Merge data.frames with duplicates

Question

I have many data.frames, for example:

df1 = data.frame(names=c(\'a\',\'b\',\'c\',\'c\',\'d\'),data1=c(1,2,3,4,5))
df2 = data.frame(names=c(\'a\',\'e\',\'e\',         


        

Answer 1

See other questions:

• How to join data frames in R (inner, outer, left, right)
• recombining-a-list-of-data-frames-into-a-single-data-frame
• ...

Examples:

library(reshape)
out <- merge_recurse(L)

or

library(plyr)

out<-join(df1, df2, type="full")
out<-join(out, df3, type="full")
*can be looped

or

library(plyr)
out<-ldply(L)