I am studying R and within the first 3 lines of
demo("graphics") I get completely stuck.
could you 1. give me the answer so I can move on 2. tell me
how I might find the answer.
Well, y'know, sometimes obstacles are more easily handled by walking
around them than by climbing over them. Who said you need to
understand demo("graphics") in order to get to know R? It's a demo, a
show-off of what glitzy graphics we can do, not a tutorial. Actually,
it might be sensible to walk through some of its examples, but the
first couple of setup lines can certainly be skipped.
On my mac OSX, the first command is equivalent to
get("quartz")()
now get("quartz") would be a regular function format
but what is get () ()? what kind of beast? does get() return
a function?
In this case, yes, exactly. In general, get() returns the R object of
the given name, which may or may not be a funtion.
I run demo("graphics") and of course I want to stop it right
away, without running through the whole demo, how do I STOP
IT! CANCEL IT? (it gets stuck on hit return to continue
lines)
This is OS and GUI dependent. On unix text terminals you can generally
hit Ctrl-C, in the Windows GUI there's a Stop button (I think), and
Aqua seems to have an Abort button.
Then I want to look at the program that generated
demo("graphics") and I find a graphic file, but no demo fx.
where is the demo("graphics") fx physically on my computer?
how do I find it on a Mac?
Somewhere in the R installation directory.
system.file("demo/graphics.R",package="graphics")
should tell you exactly, on all systems.
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907