2011/8/22 Uwe Ligges <lig...@statistik.tu-dortmund.de>
>
>
> On 22.08.2011 18:43, Rainer M Krug wrote:
>
>> Hi
>>
>> I want to create a dependence diagram of a subset of the packages on CRAN
>> and would therefore like to read the DEACRIPTION files into a list. The
>> list
>> should be as follow for each package:
>>
>> - package name: list
>> - Package: character
>> - Version: character
>> - Date: character
>> - ...
>> - Depends: character vector
>> - Suggests: character vector
>> - ...
>>
>
> Some of these informations are collected in the CRAN repository's PACKAGES
> file. If those are not sufficient, you can also read separate DESCRIPTIONS
> files, of course.
>
> There is packageDescription() in utils for accessing installed packages'
> DESCRIPTION information or just use read.dcf() to read the DESCRIPTION files
> directly.
>
> Example:
> as.list(read.dcf(system.file("**DESCRIPTION", package="tools"))[1,])
>
Thanks a lot - that works as wished. I have it working, I just have to work
out some smart way of aranging the graph and to delete the versions from the
dependency strings.
>
>
> For the dependency diagram, see
> dependsOnPkgs() and .package_dependencies() (the latter internal) in
> package tools, as well as what these guys wrote:
> Theußl, S., Ligges, U. and Hornik, K. (2011): Prospects and Challenges in R
> Package Development. Computational Statistics 26 (3), 395-404.
>
Nice - I am thinking about the same kind of graphs.
I will post some graphs here as as soon as they loo nice,
Cheers,
Rainer
>
> Uwe Ligges
>
>
>
>
>
>
>
>
> I downloaded all packages and extracted all DESCRIPTION, but I am
>> struggling
>> with the creation of the list (I tried using scan(what=list(),
>> multi.line=TRUE) with different things in list()). Before I spend to much
>> time on it, is there a function which could help me or has somebody done
>> something similar (I assume the DESCRIPTION file ust be somewhere be read
>> dueing install.packages()?
>>
>> Cheers,
>>
>> Rainer
>>
>>
>>
--
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology,
UCT), Dipl. Phys. (Germany)
Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa
Tel : +33 - (0)9 53 10 27 44
Cell: +33 - (0)6 85 62 59 98
Fax (F): +33 - (0)9 58 10 27 44
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email: rai...@krugs.de
Skype: RMkrug
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