Hi,
Unfortunately, print.trellis is not exported .
>> environment(print.trellis) <- environment(lattice::print.trellis)
returns "Error: 'print.trellis' is not an exported object from
'namespace:lattice'"
I then took the environment of lattice
search()
#package:lattice is the 2nd element
latt<-as.environment(2)
environment(print.trellis)<-latt
Yet, i get the same error as before when I run print(k), where k is
a trellis object.
This is the line in NAMESPACE for lattice (from the source)
S3method(print, trellis)
Thanks
Saptarshi
Saptarshi Guha | [EMAIL PROTECTED] | http://www.stat.purdue.edu/~sguha
On Mar 6, 2007, at 5:29 PM, Greg Snow wrote:
> You need to set the environment on your version of print.trellis to
> match that of the original (at least that is what has worked for me
> when
> trying to do modified functions from the trellis package). Try
> something like:
>
>> environment(print.trellis) <- environment(lattice::print.trellis)
>
> Hope this helps,
>
> --
> Gregory (Greg) L. Snow Ph.D.
> Statistical Data Center
> Intermountain Healthcare
> [EMAIL PROTECTED]
> (801) 408-8111
>
>
>
>> -----Original Message-----
>> From: [EMAIL PROTECTED]
>> [mailto:[EMAIL PROTECTED] On Behalf Of Saptarshi Guha
>> Sent: Tuesday, March 06, 2007 2:55 PM
>> To: R-Help
>> Subject: [R] Substituting functions in package - Lattice
>>
>> Hi,
>> I'm trying to learn how a package works but
>> substituting a parituclart function with my own (basically
>> the original one with some debug statements).
>> The package is lattice and the method is
>> "print.trellis" which is a
>> S3 method and is not visible.
>> To replace this, i sourced a file with the rewritten
>> print.trellis, and the old one was replaced.
>> However, i get this error when I attempt to print a
>> trellis object (e.g an xyplot)
>>
>> Error in assign("last.object", x, env = .LatticeEnv) :
>> object ".LatticeEnv" not found
>>
>> I notice that .LatticeEnv is defined in zzz.R (in the R
>> folder of the lattice source).
>>
>> My question, how does one do development on the lattice
>> package without having to recompile everything and install a package?
>>
>> I read something about emacs and development (i use
>> emacs) in the zzz.R file
>> "## .First.lib will be used if the NAMESPACE file is
>> missing. This is ## useful during development, thanks to C-c
>> C-l in Emacs/ESS. It won't ## be used if a NAMESPACE file is
>> present. Note: Due to registration ## of C functions done in
>> the NAMESPACE file, wireframe (and possibly ## cloud) won't
>> work in this scenario."
>>
>> But couldn't quite figure it out.
>> Thanks for any help provided.
>> Saptarshi
>>
>>
>> Saptarshi Guha | [EMAIL PROTECTED] | http://www.stat.purdue.edu/~sguha
>>
>>
>> [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help@stat.math.ethz.ch 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.
>>
>
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