[R] rownames as parameter in functions

[Johannes Schnitzler]

Dear all,

i want to give the names of columns of a data set (dat) as parameter to a
function,
in order to select single rows by the row names.

I tried several ways.
Like:
the data set :
dat
A  B C D  E
1  2  3  1  6
1  4  5  2  4
..  .. ..  ..  ..

the.col.names<-c("A","C")

f<-function(par){sapply,function(par)(dat$par*2)}

f(the.col.names)

Should give the result

A  C
2   6
2  10
..  ..


Thank you in advance


Johannes Schnitzler
schnitzlerj at gmx.de