Fills missing data where known by other observations with the same id/index
Examples
# \donttest{
data <- data.frame(ID = c(1,2,3,3,2,1),
One = c(1,NA,3,NA,2,NA),
Two = c(NA,"B",NA,"C",NA,"A"))
repaint(data, "ID", c("One","Two"))
#> ID One Two
#> 1 1 1 A
#> 2 2 2 B
#> 3 3 3 C
#> 4 3 3 C
#> 5 2 2 B
#> 6 1 1 A
# }