Name rows with a character vector in R

Question

I want to name the rows of a dataframe with a column of a second dataframe. The dataframe to be named has the same number of rows as the dataframe I want to use for naming. Meaning the name of the ith row of the first dataframe shouldhave the name of the ith value of the column of the second dataframe.

I already tried the following:

row.names(df1) <- as.character(df2[,1])

This results in all rows of df1 named after the first value in the vector of dataframe2.

Answer 1

Try this.

#Sample data
df
  a b
1 1 1
2 2 2
3 3 3
4 4 4
5 5 5

df2
  a
1 A
2 B
3 C
4 D
5 E

# Set row names
`rownames<-`(df, df2$a)

# Result
  a b
A 1 1
B 2 2
C 3 3
D 4 4
E 5 5