R help - Jul 2010 - Weired problem when passing arguments using ...?

Hello All,

I'm trying to pass the argument col.names to write.csv using '...'.
But I got the following warnings. Maybe it is very simple. But I'm not
sure what I am wrong. Could you please help point to me what the
problem is?


#####################
fun=function(x, ...) {
  fr=parent.frame()
  tmp=get(x, envir=fr)
  write.csv(
      tmp
      , file=paste(x, '.csv', sep='')
      , ...
      )
}

f=data.frame(x=1:10,y=letters[1:10])

fun('f', col.names=F)
####################
> fun('f', col.names=F)
Warning message:
In write.csv(tmp, file = paste(x, ".csv", sep = ""), ...) :
  attempt to set 'col.names' ignored

-- 
Tom

Try write.table instead.

On Wed, Jul 7, 2010 at 1:56 PM, thmsfuller066@gmail.com <
thmsfuller066@gmail.com> wrote:
> Hello All,
>
> I'm trying to pass the argument col.names to write.csv using
'...'.
> But I got the following warnings. Maybe it is very simple. But I'm not
> sure what I am wrong. Could you please help point to me what the
> problem is?
>
>
> #####################
> fun=function(x, ...) {
>  fr=parent.frame()
>  tmp=get(x, envir=fr)
>  write.csv(
>      tmp
>      , file=paste(x, '.csv', sep='')
>      , ...
>      )
> }
>
> f=data.frame(x=1:10,y=letters[1:10])
>
> fun('f', col.names=F)
> ####################
>
> > fun('f', col.names=F)
> Warning message:
> In write.csv(tmp, file = paste(x, ".csv", sep = ""),
...) :
>  attempt to set 'col.names' ignored
>
> --
> Tom
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

	[[alternative HTML version deleted]]

On Wed, 7 Jul 2010, thmsfuller066 at gmail.com wrote:
> Hello All,
>
> I'm trying to pass the argument col.names to write.csv using
'...'.
> But I got the following warnings. Maybe it is very simple. But I'm not
> sure what I am wrong. Could you please help point to me what the
> problem is?
Its not a _problem_, its a _feature_.


read

 	?write.csv

and use write.table()
>
>
> #####################
> fun=function(x, ...) {
>  fr=parent.frame()
>  tmp=get(x, envir=fr)
>  write.csv(
>      tmp
>      , file=paste(x, '.csv', sep='')
>      , ...
>      )
> }
>
> f=data.frame(x=1:10,y=letters[1:10])
>
> fun('f', col.names=F)
> ####################
>
>> fun('f', col.names=F)
> Warning message:
> In write.csv(tmp, file = paste(x, ".csv", sep = ""),
...) :
>  attempt to set 'col.names' ignored
>
> -- 
> Tom
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901

On Jul 7, 2010, at 12:56 PM, thmsfuller066 at gmail.com wrote:
> Hello All,
>
> I'm trying to pass the argument col.names to write.csv using
'...'.
> But I got the following warnings. Maybe it is very simple. But I'm not
> sure what I am wrong. Could you please help point to me what the
> problem is?
>
>
> #####################
> fun=function(x, ...) {
>  fr=parent.frame()
>  tmp=get(x, envir=fr)
>  write.csv(
>      tmp
>      , file=paste(x, '.csv', sep='')
>      , ...
>      )
> }
>
> f=data.frame(x=1:10,y=letters[1:10])
>
> fun('f', col.names=F)
> ####################
>
>> fun('f', col.names=F)
> Warning message:
> In write.csv(tmp, file = paste(x, ".csv", sep = ""),
...) :
>  attempt to set 'col.names' ignored
write.csv sets col.names according to hard-coded rules which you are  
(unsuccessfully attempting to override.

-- 

David Winsemius, MD
West Hartford, CT