Unix or Linux Commands
Command | Command | Command | Command |
---|---|---|---|
bash
| gcc
| man
| ps
|
cat
| ls
|
For descriptions of commands RTFM, which means do
man command name info command name
as appropriate. See also the the XKCD cartoon of this title.
To find the man page for a command you don't know the name of do
man -k
as doing
man man
would have told you.
R Functions
Function | Function |
---|---|
lapply
| sapply
|
To RTFM for R itself do (of course, since R is a unix command)
man R
for documentation of R functions, classes, and datasets, do (inside R)
help(object name)where object name is the name of the object. This works even for stuff that is not valid R objects if quoted, for example,
help("[") help("+") help("for")
(help(for)
wouldn't work because it doesn't parse, because for
is an R keywork not a valid R object name).
The R analog of man -k
is
help.search(object name)
?foo ??fooare abbreviations for
help(foo) help.search(foo)
respectively.