Comparation between elements in two data frames

Asked Jul 08 '17 at 07:13

Active Jul 08 '17 at 15:34

Viewed 21 times

I'd like to compare the elements a1 in df1 to a2 in df2 and put on element of b1 in b2. For example, df1[2, 1] == df2[3,1] then, df2[3,1] <- df1[2,1].

set.seed(1)
a1 <- letters
b1 <- rnorm(length(a1))

a2 <- sample(letters, 26, replace = T)
b2 <- rep(0, length(a1))

df1 <- data.frame(a1, b1)
df2 <- data.frame(a2, b2)

OBS.: This question is different of MATCH function in r. In my question, the data frame df1 presents only one kind of letters, but df2 presents repeated letters.

edited Jul 08 '17 at 15:34

asked Jul 08 '17 at 07:13

Wagner Jorge

You have data frames not matrices. And what is the output in case if df1 != df2? – Miha Jul 08 '17 at 07:57
The answer was given by , thanks. – Wagner Jorge Jul 08 '17 at 15:35

Comparation between elements in two data frames

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