How to find highest value in a data frame?

Question

I have a dataframe x with this values:

   x1  x2  x3
1  NA   4   1
2  NA   3  NA
3   4  NA   2
4  NA   1  11
5  NA   2  NA
6   5  NA   1
7   5   9           


        

Answer 1

you could write a column maximum function, colMax.

colMax <- function(data) sapply(data, max, na.rm = TRUE)

Use colMax function on sample data:

colMax(x)
#    x1     x2     x3
#   5.0    9.0    11.0