Dear All,
I would like to know why $ was deprecated for atomic vectors and
what I can use instead.
I got used to the following idiom for working with
data frames:
df <- data.frame(start=1:5,end=10:6)
apply(df,1,function(row){ return(row$start + row$end) })
I have a data.frame with named columns and
use each row to do something. I would like the
named index ($) because the column position
in the data frame changes from time to time.
The data frame is read from files.
thank you very much,
ido
'$' returns 'NULL' (with a warning) except for recursive
objects, and is only discussed in the section below on recursive
objects. Its use on non-recursive objects was deprecated in R
2.5.0.
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