[R] setting new working directories

[Bill Shipley]

Hello, and Happy New Year.  My default working directory is getting very
cluttered.  I know that I should be using a different working directory for
each project (I work in Windows), but do not know how to go about creating
different ones and moving back and forth between them.  I have read Venables
& Ripley (Modern Applied Statistics with S-PLUS, 1994) but this seems out of
date with respect to this topic and have searched through the documentation
but cannot find a clear explanation for doing this.  Can someone point me to
the proper documentation for creating and using different working
directories from within Windows (please, no comments about switching to
UNIX...).
Thanks.

Bill Shipley