hi,
am new to R. what command do i use to check of certain packages have been
loaded?
Also, it seems that most packages come with "vignette"- is this a document
that describes the usage of the package?
thanks for your help,
anjan

-- 
=============================
anjan purkayastha, phd
bioinformatics analyst
whitehead institute for biomedical research
nine cambridge center
cambridge, ma 02142

purkayas [at] wi [dot] mit [dot] edu
703.740.6939

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