I have a few questions for R:
1. Other than using a built-in function such as mean(), how do I know if
it is installed in my current version of R?
2. To get help in R, I can use several ways:
?sort
help.search("sort")
help(sort)
apropos("sort")
the help menu
are there any other ways to get help?
3. When I see a help menu for a function, does it mean the function is
installed?
4. If I execute a program file that contains output files that doesn't
have a path specified, which path is it going to output to? Is it the
Current Working Directory that the output file is going to output? if I
change the working directory by using setwd(), is that going to change
where the output file path permanently until I specify it again?
Thanks a lot!
Lynda
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