On Thu, Aug 20, 2009 at 6:05 PM, Peng Yu <pengyu.ut@gmail.com> wrote:

> Hi,
>
> in AnnotationDbi.pdf, it gives the following example code. I don't
> quite understand the second command. Does it mean that 'hgu95av2.db'
> is in the namespace of package? What does ":" mean?
>
> library("hgu95av2.db")
> ls("package:hgu95av2.db")
>

This is a way of specifying the environment in which to look for R objects.
See the help page for search() for details about what this represents.
Also, you can try search() in your workspace to get an idea of how ls() and
search() work together.

Sean

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