[R] Posting an 'S4-creating Package Problem'...

[Daniel Kosztyla]

After trying again your solution finally it worked with the collate field
in the DESCRIPTION file. The Warnings disappeared.
So indeed I have to thank you very much. Best wishes... Dan


On Sun, 7 Feb 2010, Martin Morgan wrote:

> On 02/06/2010 03:39 PM, Daniel Kosztyla wrote:
>> Hello R-Team,
>>
>> May you help me to post a 'S4-creating Package Problem'?
>> Thanks already now for supporting.
>> The problem sounds like:
>>
>> Hello R forum,
>>
>> while compiling my R-package these 'Warnings' occur:
>>
>> ...
>> Warnung in matchSignature(signature, fdef, where) :
>>   in the method signature for function "plot" no definition for class:
>> "prediction"
>> Warnung in matchSignature(signature, fdef, where) :
>>   in the method signature for function "plot" no definition for class:
>> "validation"
>> ** help
>> *** installing help indices
>> ...
>>
>> Maybe my NAMESPACE file looks wrong. Has anybody an idea how it has to
>> look like to solve
>> this problem? ( I use exportClasses(...), exportMethods(...). )
>>
>> I have 3 classes: 'prediction', 'validation', 'nvalidation' which have a
>> plot function.
>> There's no warning for class 'nvalidation' but for the other two.
>> Any suggestions?
>
> Hi Dan
>
> Files in a package are collated and then sourced. If your 'prediction'
> class is in prediction.R, and your plot method is in plot.R, then the
> files will be collated plot.R, prediction.R, and the class definition
> for prediction will be unknown when the plot method is defined. Use
> Collate: in the DESCRIPTION file, or put class (and generic) definitions
> in files that collate early, e.g., AllClasses.R, AllGenerics.R.
>
> Hope that helps,
>
> Martin
>>
>> Greetings. Dan
>>
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>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
>
> -- 
> Martin Morgan
> Computational Biology / Fred Hutchinson Cancer Research Center
> 1100 Fairview Ave. N.
> PO Box 19024 Seattle, WA 98109
>
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>