search for: someenvvar

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2010 Feb 12
2
How to source files from a search path?
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 something?