R help - Jan 2010 - plyr: issue with column names when converting one element list to dataframe

Hi,

I have an issue concerning plyr.
I have a list l as output from dlply.

 > l
$`1`
      (0.5,1.5] (1.5,2.5] (2.5,3.5]  (3.5,4.5]
f5_9 0.2342569  0.465995 0.2518892 0.04785894

attr(,"split_type")
[1] "data.frame"
attr(,"split_labels")
   f15
1   1

When I convert it into a dataframe I get.

 > list_to_dataframe(l)
   .id X.0.5.1.5. X.1.5.2.5. X.2.5.3.5. X.3.5.4.5.
1   1  0.2342569   0.465995  0.2518892 0.04785894

The column labels have names I do not want.
When I do the same using two list elements everything is fine, that is  
column names are as desired.

 > l2 <- c(l,l)
 > list_to_dataframe(l2)
   .id (0.5,1.5] (1.5,2.5] (2.5,3.5]  (3.5,4.5]
1   1 0.2342569  0.465995 0.2518892 0.04785894
2   1 0.2342569  0.465995 0.2518892 0.04785894

Does someone know a remedy?

TIA,
Mark

> Mark Heckmann
> Dipl. Wirt.-Ing. cand. Psych.
> Vorstra?e 93 B01
> 28359 Bremen
> Blog: www.markheckmann.de
> R-Blog: http://ryouready.wordpress.com

Hi Mark,

Could you send a the results of dput(l)?  It will make exploration easier.

Hadley

On Wed, Jan 6, 2010 at 8:07 AM, Mark Heckmann <mark.heckmann at gmx.de>
wrote:
>
> Hi,
>
> I have an issue concerning plyr.
> I have a list l as output from dlply.
>
>> l
> $`1`
> ? ? (0.5,1.5] (1.5,2.5] (2.5,3.5] ?(3.5,4.5]
> f5_9 0.2342569 ?0.465995 0.2518892 0.04785894
>
> attr(,"split_type")
> [1] "data.frame"
> attr(,"split_labels")
> ?f15
> 1 ? 1
>
> When I convert it into a dataframe I get.
>
>> list_to_dataframe(l)
> ?.id X.0.5.1.5. X.1.5.2.5. X.2.5.3.5. X.3.5.4.5.
> 1 ? 1 ?0.2342569 ? 0.465995 ?0.2518892 0.04785894
>
> The column labels have names I do not want.
> When I do the same using two list elements everything is fine, that is
> column names are as desired.
>
>> l2 <- c(l,l)
>> list_to_dataframe(l2)
> ?.id (0.5,1.5] (1.5,2.5] (2.5,3.5] ?(3.5,4.5]
> 1 ? 1 0.2342569 ?0.465995 0.2518892 0.04785894
> 2 ? 1 0.2342569 ?0.465995 0.2518892 0.04785894
>
> Does someone know a remedy?
>
> TIA,
> Mark
>
>
>> Mark Heckmann
>> Dipl. Wirt.-Ing. cand. Psych.
>> Vorstra?e 93 B01
>> 28359 Bremen
>> Blog: www.markheckmann.de
>> R-Blog: http://ryouready.wordpress.com
>
> ______________________________________________
> 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.
>


-- 
http://had.co.nz/

Hadley,

thanks for the quick reply:

 > dput(l)
list(structure(c(0.182198327359618, 0.473715651135006, 0.29689366786141,
0.0471923536439665), .Dim = c(1L, 4L), .Dimnames = list("f5_9",
     c("(0.5,1.5]", "(1.5,2.5]", "(2.5,3.5]",
"(3.5,4.5]"))))

Mark


Am 06.01.2010 um 15:48 schrieb hadley wickham:
> Hi Mark,
>
> Could you send a the results of dput(l)?  It will make exploration  
> easier.
>
> Hadley
>
> On Wed, Jan 6, 2010 at 8:07 AM, Mark Heckmann <mark.heckmann at
gmx.de>
> wrote:
>>
>> Hi,
>>
>> I have an issue concerning plyr.
>> I have a list l as output from dlply.
>>
>>> l
>> $`1`
>>     (0.5,1.5] (1.5,2.5] (2.5,3.5]  (3.5,4.5]
>> f5_9 0.2342569  0.465995 0.2518892 0.04785894
>>
>> attr(,"split_type")
>> [1] "data.frame"
>> attr(,"split_labels")
>>  f15
>> 1   1
>>
>> When I convert it into a dataframe I get.
>>
>>> list_to_dataframe(l)
>>  .id X.0.5.1.5. X.1.5.2.5. X.2.5.3.5. X.3.5.4.5.
>> 1   1  0.2342569   0.465995  0.2518892 0.04785894
>>
>> The column labels have names I do not want.
>> When I do the same using two list elements everything is fine, that  
>> is
>> column names are as desired.
>>
>>> l2 <- c(l,l)
>>> list_to_dataframe(l2)
>>  .id (0.5,1.5] (1.5,2.5] (2.5,3.5]  (3.5,4.5]
>> 1   1 0.2342569  0.465995 0.2518892 0.04785894
>> 2   1 0.2342569  0.465995 0.2518892 0.04785894
>>
>> Does someone know a remedy?
>>
>> TIA,
>> Mark
>>
>>
>>> Mark Heckmann
>>> Dipl. Wirt.-Ing. cand. Psych.
>>> Vorstra?e 93 B01
>>> 28359 Bremen
>>> Blog: www.markheckmann.de
>>> R-Blog: http://ryouready.wordpress.com
>>
>> ______________________________________________
>> 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.
>>
>
>
>
> -- 
> http://had.co.nz/