have a look at merge(), e.g.,

df1 <- data.frame(A = c(1,2), B = c("m","f"), C = c("at home", "away"))
df2 <- data.frame(A = c(2), C = c("at home"))

merge(df1, df2, all = TRUE, sort = FALSE)


I hope it helps.

Best,
Dimitris


Stefan Uhmann wrote:
Dear List,

I have two dataframes with overlapping colnames and want to merge them. Actually, what I want is more similar to rbind, but the dataframes differ in their columns. Here are the examples:

df1 <- data.frame(A = c(1,2), B = c("m","f"), C = c("at home", "away"))
df2 <- data.frame(A = c(2), C = c("at home"))

Here the desired result:

  A B        C
1 1 m  at home
2 2 f     away
3 2 NA at home

Thanks for any help,
Stefan

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Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus Medical Center

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