| options {base} | R Documentation |
Options Settings
Description
options allows the user to set and examine a variety of global
“options” which affect the way in which R computes and displays
its results.
Usage
options(...)
.Options
Arguments
... |
any options can be defined, using Further, |
prompt |
a string, used for R's prompt; should usually end in a
blank ( |
continue |
a string setting the prompt used for lines which continue over one line. |
width |
controls the number of characters on a line. You may want to change this if you resize the window that R is running in. |
digits |
controls the number of digits to print when printing numeric values. It is a suggestion only. |
editor |
sets the default text editor, e.g., for |
browser |
default HTML browser used by |
contrasts |
the default |
expressions |
sets a limit on the number of nested expressions that will be evaluated. This is especially important on the Macintosh since stack overflow is likely if this is set too high. |
na.action |
the name of a function for treating missing values
( |
pager |
the (standalone) program used for displaying ASCII files on R's console. Defaults to ‘\$RHOME/bin/pager’. |
papersize |
the paper format used for graphics printing; currently read-only, set by environment variable R\_PAPERSIZE, or in ‘config.site’. |
printcmd |
the command used for graphics printing; currently read-only, set by environment variable R\_PRINTCMD, or in ‘config.site’. |
show.signif.stars, show.coef.Pvalues |
logical, affecting P value
printing, see |
ts.eps |
the relative tolerance for certain time series
( |
Details
Invoking options() with no arguments returns a list with the
current values of the options.
.Options is another way to access this list “read only”.
Accessing current options, usually will work with .Options$width
(e.g.), rather than options("width") which is a list of
length one.
Value
A list (in any case) with the previous values of the options changed, or all options when no arguments were given.
Examples
options() # printing all current options
op <- options(); str(op) # nicer printing
# .Options is the same:
all(sapply(1:length(op), function(i) all(.Options[[i]] == op[[i]])))
options('width')[[1]] == options()$width # the latter needs more memory
options(digits=20)
pi
# set the editor, and save previous value
old.o <- options(editor="nedit")
old.o
options(op) # reset (all) initial options
options('digits')