>>>>> "Simon" == Simon Fear <[EMAIL PROTECTED]>
>>>>> on Thu, 13 Nov 2003 09:53:17 -0000 writes:
Simon> I'd recommend you read the code for barplot (it's all
Simon> in R; just type barplot.default at the prompt) then
Simon> emulate the xlim calculation prior to starting your
Simon> series of plots, calling each plot with the same
Simon> xlim.
Simon> Reading the base package coding is always VERY
Simon> instructive. Takes time, but it's worth it.
and Paul confirmed this was useful advice.
Just one general remark: Many users know that it is useful to
look at function definitions that way. Less and less users
however seem to be aware that this is *NOT* the source code in a
strict sense.
One important difference is that the source code *does* have
comments that you'll never see for base package functions if you
just inspect their value.
While there is
options(keep.source = TRUE) ## per default
options(keep.source.pkgs = FALSE) ## per default
these do not influence the base package code.
If you compile R from the source, then the base package source
is in the many <R_SRC_HOME/src/library/base/R/*.R files.
Otherwise, you can still see the source __including__ comments
by inspecting the (about 1 MB large) file
> system.file("R","base")
which has all the definitions concatenated into one file.
For other packages than base, you might
1) consider setting
> options(keep.source.pkgs = TRUE)
in your Rprofile {which will need more memory and time to load packages !!!},
2) or inspect the contents of, e.g.
> system.file("R", "splines", package = "splines")
for the splines package.
3) or (as I do) work with the real source in <sourcepackage>/R/*.R.
Martin Maechler <[EMAIL PROTECTED]> http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum LEO C16 Leonhardstr. 27
ETH (Federal Inst. Technology) 8092 Zurich SWITZERLAND
phone: x-41-1-632-3408 fax: ...-1228 <><
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