[R] Selective package installation

Partha Sinha pnsinha68 at gmail.com
Mon May 18 09:14:37 CEST 2015

I am using Win 7, 32 bit and R 3.2.0

I want to install few packages via script.
The script should first check if the package is already installed (I
dont want update).If the package is already there , then it would go
to the next package in my list.
How can I do this ?

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