R help - Aug 2008 - print data frames without row names (within a list)

This should be an easy one, but I could not find the answer in the
obvious places.

one <- data.frame(a=c(1,2,3),b=c("x","y","z"))
two <- data.frame(a=c(4,5,6),b=c("q","r","s"))
> print(one)
 a b
1 1 x
2 2 y
3 3 z
> print(one,row.names=F)
 a b
 1 x
 2 y
 3 z

So far, so good, but how do I do this if the data frames are bound into a list?
> three <- list(one,two)
> print(three,row.names=F)  #same as print(three,row.names=T)
[[1]]
 a b
1 1 x
2 2 y
3 3 z

[[2]]
 a b
1 4 q
2 5 r
3 6 s

Is there any way to stop the row (or column) names from printing in a
case like this?
I just thought of one way - change the default in print.data.frame()
and reload that function.

Surprisingly, that does not work. I have successfully changed the
behavior of:
> print(one)
> one
These now print without row names, but
> print(three)
continues to print the row names, even though
> class(three[[1]])
is "data.frame", so I'm not clear why it doesn't take the
print
defaults from print.data.frame!

Any advice would be appreciated. I can live with the row names, but
there are cases where I want to suppress them within a list.

Thanks,
Daniel

Try auto-printing, e.g.
> three
[[1]]
  a b
  1 x
  2 y
  3 z

[[2]]
  a b
  4 q
  5 r
  6 s

or change print.data.frame *in the base namespace* by fixInNamespace.

When you said you 'reloaded that function' I suspect that in fact you 
source()-d it into a different place, your workspace.


On Sun, 10 Aug 2008, Daniel Ezra Johnson wrote:
> This should be an easy one, but I could not find the answer in the
> obvious places.
>
> one <-
data.frame(a=c(1,2,3),b=c("x","y","z"))
> two <-
data.frame(a=c(4,5,6),b=c("q","r","s"))
>
>> print(one)
> a b
> 1 1 x
> 2 2 y
> 3 3 z
>
>> print(one,row.names=F)
> a b
> 1 x
> 2 y
> 3 z
>
> So far, so good, but how do I do this if the data frames are bound into 
> a list?
>
>> three <- list(one,two)
>> print(three,row.names=F)  #same as print(three,row.names=T)
>
> [[1]]
> a b
> 1 1 x
> 2 2 y
> 3 3 z
>
> [[2]]
> a b
> 1 4 q
> 2 5 r
> 3 6 s
>
> Is there any way to stop the row (or column) names from printing in a
> case like this?
> I just thought of one way - change the default in print.data.frame()
> and reload that function.
>
> Surprisingly, that does not work. I have successfully changed the
> behavior of:
>
>> print(one)
>> one
>
> These now print without row names, but
>
>> print(three)
>
> continues to print the row names, even though
>
>> class(three[[1]])
>
> is "data.frame", so I'm not clear why it doesn't take the
print
> defaults from print.data.frame!
>
> Any advice would be appreciated. I can live with the row names, but
> there are cases where I want to suppress them within a list.
>
> Thanks,
> Daniel
>
> ______________________________________________
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
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>
-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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