Combine two or more columns in a dataframe into a new column with a new name

Question

For example if I have this:

n = c(2, 3, 5)  s = c("aa", "bb", "cc")  b = c(TRUE, FALSE, TRUE)  df = data.frame(n, s, b)    n  s     b 1 2 aa  TRUE 2 3 bb FALSE 3 5 cc  TRUE 

Then how do I combine the two columns n and s into a new column named x such that it looks like this:

  n  s     b     x 1 2 aa  TRUE  2 aa 2 3 bb FALSE  3 bb 3 5 cc  TRUE  5 cc 

Answer 1

Use paste.

 df$x <- paste(df$n,df$s)  df #   n  s     b    x # 1 2 aa  TRUE 2 aa # 2 3 bb FALSE 3 bb # 3 5 cc  TRUE 5 cc