[R] dataframe - column value calculation in R

[Timothy Bates]

On 26 May 2011, at 08:02, Vijayan Padmanabhan wrote:
> I have a requirement for which I am seeking help.

Best to just ask, compactly. This is a very straightforward question: best to read on how to use R: You are just set 1 column of a dataframe to a value based on the others, applying this to all rows: This is just what R does by default

So you can solve your problem by extension from 

df$E = sqrt(df$A) + (df$B * df$D)


A B C D
1 2   3  4