panel.qqmath
Default Panel Function for qqmath
Description
This is the default panel function for qqmath
.
Usage
panel.qqmath(x, f.value = NULL, distribution = qnorm, qtype = 7, groups = NULL, ..., tails.n = 0, identifier = "qqmath")
Arguments
x | vector (typically numeric, coerced if not) of data values to be used in the panel. |
f.value, distribution | Defines how quantiles are calculated. See |
qtype | The |
groups | An optional grouping variable. Within each panel, one Q-Q plot is produced for every level of this grouping variable, differentiated by different graphical parameters. |
... | Further arguments, often graphical parameters, eventually passed on to |
tails.n | number of data points to represent exactly on each tail of the distribution. This reproduces the effect of |
identifier | A character string that is prepended to the names of grobs that are created by this panel function. |
Details
Creates a Q-Q plot of the data and the theoretical distribution given by distribution
. Note that most of the arguments controlling the display can be supplied directly to the high-level qqmath
call.
Author(s)
Deepayan Sarkar [email protected]
See Also
Examples
set.seed(0) xx <- rt(10000, df = 10) qqmath(~ xx, pch = "+", distribution = qnorm, grid = TRUE, abline = c(0, 1), xlab.top = c("raw", "ppoints(100)", "tails.n = 50"), panel = function(..., f.value) { switch(panel.number(), panel.qqmath(..., f.value = NULL), panel.qqmath(..., f.value = ppoints(100)), panel.qqmath(..., f.value = ppoints(100), tails.n = 50)) }, layout = c(3, 1))[c(1,1,1)]
Copyright (©) 1999–2012 R Foundation for Statistical Computing.
Licensed under the GNU General Public License.