[BioC] Annotation.db: how automatically call a mapping?

[John Zhang]

>> symbols <- mget(probeids, gh[33])
>Error in mget(probeids, gh[33]) : second argument must be an environment

Have you tried 

symbols <- mget(probeids, get(gh[33]))


> 
>This also doesn't work:
>> symbols <- mget(probeids, envir=gh[33])
>Error in mget(probeids, envir = gh[33]) : 
>  second argument must be an environment
> 
>My approach thus is the wrong approach to automatically extract mappings
>from a annotation.db. 
>Since i don't know about any other possibility, i would appreciate if
>someone could point me to a working solution.
> 
>Thanks,
>Guido  
> 
>
>------------------------------------------------ 
>Guido Hooiveld, PhD 
>Nutrition, Metabolism & Genomics Group 
>Division of Human Nutrition 
>Wageningen University 
>Biotechnion, Bomenweg 2 
>NL-6703 HD Wageningen 
>the Netherlands 
>tel: (+)31 317 485788 
>fax: (+)31 317 483342 
>internet:   http://nutrigene.4t.com <http://nutrigene.4t.com/>  
>email:      guido.hooiveld at wur.nl 
>
>
>
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Jianhua Zhang
Department of Medical Oncology
Dana-Farber Cancer Institute
44 Binney Street
Boston, MA 02115-6084