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asbio (version 1.3-1)

qq.Plot: 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 bootsrapped 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, ...)

Arguments

y
The response variable
x
A categorical variables to subset y
col
A scalar or vector with length equivelent to the number of levels in x, describing colors of points and lines for levels in x.
pch
A scalar or vector with length equivelent 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 "point" or "overall".
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.
...
Other arguments from plot.

See Also

qqnorm, qqline, envelope, boot

Examples

Run this code
y <- rnorm(50)
x <- c(rep(1, 25), rep(2, 25))
qq.Plot(y, x)

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