R help - Jan 2010 - Working with source file

I am trying to build an easy to use climate data analysis tool kit that will
let non-R users run my detailed r script with minimum R learning curve
effort.

Here's an example:

link <-
"http://chartsgraphs.wordpress.com/files/2010/01/nsidc_trend_plot_2.doc"
source(link)

This lets user run my R script stored at site 1 and work with data stored at
site 2 without having to worry about links, R script details or downloading
anything.

They get the plot. What if they'd like to see R script or see contents of
data frames, or change the plot parameters?

My questions:

1. how can user get list of just data.frames to investigate the data?
2. how can user list my R script in the session so that he/she can adjust
it?


My R scripts retrieve raw data, process it and organize it for analysis. I'd
like the users to be able to save the data, subset, modify data and make
their own plots.

I can't seem to find out any information on how to "look at"
sourced R
scripts. Suggestions on where to look will be appreciated.

D Kelly O'Day
http:chartsgraphs.wordpress.com





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On Wed, Jan 6, 2010 at 8:34 PM, D Kelly O'Day
<koday@processtrends.com>wrote:
>
> I am trying to build an easy to use climate data analysis tool kit that
> will
> let non-R users run my detailed r script with minimum R learning curve
> effort.
>
> Here's an example:
>
> link <-
>
"http://chartsgraphs.wordpress.com/files/2010/01/nsidc_trend_plot_2.doc"
> source(link)
>
>  Why is it called '.doc'?  ".R" would be normal, this
makes me think it's a
word document...

>
> My questions:
>
> 1. how can user get list of just data.frames to investigate the data?
>
 ls() ? I'm not sure exactly what you mean here...

> 2. how can user list my R script in the session so that he/she can adjust
> it?
>
>
> My R scripts retrieve raw data, process it and organize it for analysis.
> I'd
> like the users to be able to save the data, subset, modify data and make
> their own plots.
>
> I can't seem to find out any information on how to "look at"
sourced R
> scripts. Suggestions on where to look will be appreciated.
>
>
 You can use a URL in many places where you can use a filename in R. So I
can read in your script above with:

 f=readLines("
http://chartsgraphs.wordpress.com/files/2010/01/nsidc_trend_plot_2.doc")

 now f[1] is the first line of your file, f[2] is the second and so on.

 You might be better off using download.file(), which gets and stores a
file. Then persuade your users to edit it with an editor (use
file.edit(filename)) and then source it again.


 Useful?

Barry

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