r collapse columns into one code example

Example 1: how to combine all columns into one column in r

unite(data, col, ..., sep = "_", remove = TRUE, na.rm = FALSE)

Example 2: combine ro columns in r

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