How random values considering the smallest and largest value of a specific column

Question

How do I generate random values considering the smallest and largest value of column AB to insert into column CB . So it can be any value in the range from the lowest value to the highest value.

df<-structure(list(AB = c(23,252.23,111,2345.2,123.4), CB = c("", "", "", "", "")), row.names = c(NA, 5L), class = "data.frame")

> df
       AB CB
1   23.00   
2  252.23   
3  111.00   
4 2345.20   
5  123.40 

Answer 1

We may get the range of 'AB' and sample with replace = TRUE to fill the 'CB' column

df$CB <- sample(seq(min(df$AB), max(df$AB), by = 0.01), 
     length(df$AB), replace = TRUE)