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changing colnames in dataframes

2 messages · Wolfgang Lindner, Brian Ripley

Wolfgang Lindner
# 
dear all,

I'm building new dataframes from bigger one's using e.g. columns F76, F83,
F90:

JJ<-data.frame( c( as.character(rep( gender,3))) , c( F76,6- F83, F90) )

Looking into JJ one has:

    c.as.character.rep.gender..8...
c.6...F73..F78..F79..F82..6...F84..F94..F106..F109
1                                     w                   2
2                                     w                   3
3                                     m                  1
etc.

Instead of the automatic colnames 'c.as.character.rep.gender..8' I like to
have the colnames 'gender' and 'J.value'.
I tried levels, labels etc but without success.

OK, I can fix(FF) manually, but this is bad, because it has to be done again
and again ..
OK, I can do

gender.J<-c( as.character(rep( gender,3)))
Jvalue<-c( F76,6- F83, F90)
JJ<-data.frame(gender.J, J.value)

but this is not optimal because 'gender' is depending on rep(.., n) and I
have many dataframes KK, LL, .. using 'gender' with different size.

Question: is it possible to do something like

JJ<-data.frame(c( as.character(rep( gender,3))),c( F76,6- F83, F90),  ??
col.names=c("gender","Jvalue") ?? )

Sorry, if my question is elementary, but I could not find a fix.

Thank your for your advice.

hth

Wolfgang
Brian Ripley
# 
See the help page.  You name the arguments, e.g.

JJ <- data.frame( gender= c( as.character(rep( gender,3))) ,
                   J.value -c( F76 ,6-F83, F90) )

The help says

Arguments:

      ...: these arguments are of either the form 'value' or 'tag =
           value'.  Component names are created based on the tag (if
           present) or the deparsed argument itself.
On Wed, 3 Dec 2008, Wolfgang Lindner wrote: