[R] Forking and adapting an R package

[BONACHE Adrien]

Hi Timo,
To perform the first point, you just have to write the function name in R without using parentheses and arguments after it. You will see the code of the function. Copy and Paste it on notepad, change the name of the function in the notepad, then change what you want to change in your function. After it copy and paste the function in R. Use it!
Best wishes with your code!
Adrien.

      De : "timo at timogrossenbacher.ch" <timo at timogrossenbacher.ch>
 À : "Adams, Jean" <jvadams at usgs.gov>; r-help <r-help at r-project.org> 
 Envoyé le : Jeudi 14 juillet 2016 8h40
 Objet : Re: [R] Forking and adapting an R package
   
On Jul 13, 2016 15:02, Adams, Jean wrote:
>
> Timo,
>
> A couple of thoughts ...
>
> First, could you achieve what you want by simply modifying (your own copies
> of) a function or two from the hexbin package, without having to modify the
> entire package?  This might give you fewer tripping points.
>

Good point, how would I do this? Just copy-paste the original source and
redeclare/overwrite the functions within my use case script?

> Second, right after you forked the package (so that you have a copy on your
> own space on GitHub) and before you modified anything ... were you able to
> install and use the package from there successfully?
>>
>> library("devtools")
>> devtools::install_github("grssnbchr/hexbin")
>> library(hexbin)
>

I basically forked and cloned it, and then ran devtools::check() without
modifying anything, and it threw an error when compiling the vignette. Also
building fails this way. It seems to work fine when installed with
devtools::install_github(). Weird, I know.

Anyhow, the question with (modifying and) debugging a (forked) package in order
to understand how it works still stands, maybe there's something in Hadley's
book that I oversaw.

Timo

>
> Jean
>
> On Tue, Jul 12, 2016 at 6:28 AM, <timo at timogrossenbacher.ch> wrote:
>>
>> Hello.
>>
>> I'm trying to adapt the package “hexbin” to suit my needs. This is the first
>> time I do this. I've read a bit through Hadley's “R packages”, but now I'm
>> pretty lost (from a workflow point of view). I am using RStudio and Hadley's
>> devtools.
>>
>> So I forked the repo I want to adapt: https://github.com/grssnbchr/hexbin
>>  and
>> cloned it using RStudio (I created a new project). What I basically want to
>> do
>> is adapt the package slightly and use the adapted source on my use case (an
>> Rmd
>> file in another location) - ideally, I would call the respective function
>> (hexbin::grid.hexagons) in the Rmd and the source code of “hexbin” would be
>> called and debugged (just for understanding what the package “hexbin”
>> actually
>> does in that case, I do not have to build it yet, or even publish it). What
>> is
>> the workflow for this?
>>
>> Also, I tried running devtools::check() and it already fails there:
>> R version 3.2.5 (2016-04-14) -- "Very, Very Secure Dishes"
>>
>> Platform: x86_64-pc-linux-gnu (64-bit)
>>
>> > devtools::check()
>> Updating hexbin documentation
>> Loading hexbin
>> Creating a generic function for ‘plot’ from package ‘graphics’ in package
>> ‘hexbin’
>> Creating a generic function for ‘summary’ from package ‘base’ in package
>> ‘hexbin’
>> Setting env vars
>> -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>> CFLAGS : -Wall -pedantic
>> CXXFLAGS: -Wall -pedantic
>> Building hexbin
>> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>> '/usr/lib/R/bin/R' --no-site-file --no-environ --no-save --no-restore --quiet
>> CMD build '/home/tgrossen/R/hexbin' --no-resave-data --no-manual
>>
>> * checking for file ‘/home/tgrossen/R/hexbin/DESCRIPTION’ ... OK
>> * preparing ‘hexbin’:
>> * checking DESCRIPTION meta-information ... OK
>> * cleaning src
>> * installing the package to build vignettes
>> * creating vignettes ... ERROR
>>
>> Error: processing vignette 'hexagon_binning.Rnw' failed with diagnostics:
>>  chunk 1 (label = comphexsq)
>> Error in eval(expr, envir, enclos) : could not find function “hexbin”
>> Execution halted
>> Error: Command failed (1)
>>
>> As you can see, I am very much lost. I googled for "adapt R package and
>> debug"
>> and so forth but couldn't find any tutorial or anything.
>>
>> Thanks,
>>
>> Timo
>>
>> ______________________________________________
>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> 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.
>
>

______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

  
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