R help - Jul 2009 - create dataset permanently in package (i.e. default or our own package)

Hi,
actually while opening R console and R commander we see some packages like
car and datasets. in this packages we have default datasets are available.
example: women and prestige like that. now i created a sales dataset
importing from excel, xml or text file. now i want to store that dataset
permanently  in any one of the package like i mentioned above (car or
datasets). now i closed my R session. after some time i opened R console and
R commander. Now I will not create again sales dataset.While clicking any
one of package that sales dataset should be found. 
if possible please give me the code it will be very helpful for us.

Thanks in advance.


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Mr. Einstein,

On Jul 27, 2009, at 7:27 AM, Albert EINstEIN wrote:
> Hi,
> actually while opening R console and R commander we see some  
> packages like
> car and datasets. in this packages we have default datasets are  
> available.
> example: women and prestige like that. now i created a sales dataset
> importing from excel, xml or text file. now i want to store that  
> dataset
> permanently  in any one of the package like i mentioned above (car or
> datasets). now i closed my R session. after some time i opened R  
> console and
> R commander. Now I will not create again sales dataset.While  
> clicking any
> one of package that sales dataset should be found.
> if possible please give me the code it will be very helpful for us.
I'm not sure if this is exactly what you're asking, but this is the  
question I'm going to answer:

How can I include/bundle a dataset with a package that I am developing?

Answer:

Simply save your dataset into an *.rda/*.RData file and place it in  
the data directory of the package you're developing.

So, for example, let's say you've done so and the name of your file is  
"TheoryOfRelativity.rda".Once the package is installed (and  
loaded(?)), you can load the datafile it by calling:

data(TheoryOfRelativity)

===
I'm not sure that saving your own data file into *some random*  
package's data directory is a good idea, or what you're asking, but  
you can do that, too. Just specify the package you need to load it from.

For example, if I saved 'TheoryOfRelativity.rda' in the 'nnet'  
package's data directory (for some weird reason). You can load it like  
so:

load(TheoryOfRelativity, package='nnet')

HTH,
-steve

--
Steve Lianoglou
Graduate Student: Computational Systems Biology
   |  Memorial Sloan-Kettering Cancer Center
   |  Weill Medical College of Cornell University
Contact Info: http://cbio.mskcc.org/~lianos/contact

Albert EINstEIN wrote:
> 
> Hi,
> actually while opening R console and R commander we see some packages like
> car and datasets. in this packages we have default datasets are available.
> example: women and prestige like that. now i created a sales dataset
> importing from excel, xml or text file. now i want to store that dataset
> permanently  in any one of the package like i mentioned above (car or
> datasets). now i closed my R session. after some time i opened R console
> and R commander. Now I will not create again sales dataset.While clicking
> any one of package that sales dataset should be found. 
> if possible please give me the code it will be very helpful for us.
> 
> Thanks in advance.
> 
> 
The steps you need to follow are:

1. Open a new R session.

2. Create your 'sales' dataset and any other datasets you want to
preserve.
Make sure these are the only objects in your workspace- i.e. they are the
only names that come up when you use ls().

3. Create a new package using package.skeleton('myPackage')

This will create a new folder called myPackage that contains a folder called
data. Inside data will be a .rda file for your sales dataset and any other
datasets you had in your environment at the time package.sekeleton was run.

Now you need to install your package. This can be done by:

system('R CMD INSTALL myPackage')

Or from the command line:

R CMD INSTALL myPackage

Note that if you are using Windows, you will need to install Duncan
Murdoch's Rtools package located at:

http://www.murdoch-sutherland.com/Rtools/

If the installer asks anything about modifying your PATH, allow it to do so.

Once the package has been installed, you can load your dataset using:

library(myPackage)
data(sales)

If you want to add additional data sets, save them to individual .rda files
using:

save('myFirstNewDataset',file='myFirstNewDataset.rda')
save('mySecondNewDataset',file='mySecondNewDataset.rda')

Then move the .rda files to the data folder inside the myPackage folder and
re-run R CMD INSTALL

Hope that helps!

-Charlie

-----
Charlie Sharpsteen
Undergraduate
Environmental Resources Engineering
Humboldt State University
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