[R] How to source files from a search path?

blue sky bluesky315 at gmail.com
Fri Feb 12 23:55:11 CET 2010

Suppose some environment variable (say MY_R_INC) has a number of
paths. I want to source some file relative to some path in $MY_R_INC
(just as #include in C++ does, which looks for header file in a number
of directories). I RSiteSearch'ed, but I don't find any function that
satisfies my need. Could somebody let me know if I overlooked

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