R help - Aug 2010 - Problem using 'get'

Hi all,

I have loaded a table called 'data' and used the split command to create
a new table called 'datasplit' based on the variable
'a.ImageNumber' in 'data'.  a.ImageNumber just specifies the
image number that certain measurements are associated with (so there could be
330 measurements from image 1 and 297 measurements from image 2 etc).

I would now like to retrieve information using the get command but I am running
into some problems.

If I want to retrieve the data for the measurement parameter I call
"Area" from image 3, I can type:
> datasplit$"3"$Area
R then outputs the list of Area measurements for image 3.

However if I type:
> get("datasplit$\"3\"$Area")
or
>get('datasplit$"3"$Area')
R returns errors saying the object does not exist.

Any help is appreciated,

JT

Johnny Tkach, PhD
Donnelly CCBR, Rm. 1230	
Department of Biochemistry
University of Toronto

Try this:

get('datasplit')$'3'$Area

On Wed, Aug 18, 2010 at 1:53 PM, Johnny Tkach
<johnny.tkach@utoronto.ca>wrote:
> Hi all,
>
> I have loaded a table called 'data' and used the split command to
create a
> new table called 'datasplit' based on the variable
'a.ImageNumber' in
> 'data'.  a.ImageNumber just specifies the image number that certain
> measurements are associated with (so there could be 330 measurements from
> image 1 and 297 measurements from image 2 etc).
>
> I would now like to retrieve information using the get command but I am
> running into some problems.
>
> If I want to retrieve the data for the measurement parameter I call
"Area"
> from image 3, I can type:
>
> > datasplit$"3"$Area
>
> R then outputs the list of Area measurements for image 3.
>
> However if I type:
>
> > get("datasplit$\"3\"$Area")
>
> or
>
> >get('datasplit$"3"$Area')
>
> R returns errors saying the object does not exist.
>
> Any help is appreciated,
>
> JT
>
> Johnny Tkach, PhD
> Donnelly CCBR, Rm. 1230
> Department of Biochemistry
> University of Toronto
>
> ______________________________________________
> 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

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