qq.Plot {asbio} | R Documentation |
Normal quantile plots for single or multiple factor levels
Description
Provides quantile plots for one or more factor levels overlaid on a single graph. If plot.CI = TRUE
, then
code for bootstrapped confidence provided in the documentation for boot
is applied to create confidence envelopes. If plot.CI = FALSE
, qqnorm
and qqline
are used to create overlaid normal probability plots given multiple categories in x
.
Usage
qq.Plot(y, x = NULL, col = NULL, pch = NULL, main = "", R = 5000, fit.lty = 1,
env.lty = 2, conf = 0.95, type = "point", ylim = NULL, xlim = NULL, xlab = NULL,
ylab = NULL, plot.CI = FALSE, standy = TRUE, ...)
Arguments
y |
The response variable |
x |
A categorical variable to subset y |
col |
A scalar or vector with length equivalent to the number of levels in x, describing colors of points and lines for levels in x. |
pch |
A scalar or vector with length equivalent to the number of levels in x, describing symbols for levels in x. |
main |
Main title. |
R |
Number of bootstrap samples for calculating confidence envelopes |
fit.lty |
Line type for fit line(s). |
env.lty |
Line type for fit line(s). |
conf |
Level of confidence in confidence envelopes. |
type |
Type of bootstrapped confidence envelope. One of |
xlim |
A two element vector defining the lower and upper x-axis limits . |
ylim |
A two element vector defining the lower and upper y-axis limits . |
xlab |
X-axis label. |
ylab |
Y-axis label. |
plot.CI |
Logical, specifying whether or not confidence ellipses should be plotted. |
standy |
Logical, specifying if observations should be standardized. |
... |
Other arguments from |
Author(s)
Ken Aho
See Also
qqnorm
, qqline
, envelope
, boot
Examples
y <- rnorm(50)
x <- c(rep(1, 25), rep(2, 25))
qq.Plot(y, x)