byf.qqnorm {RVAideMemoire}

QQ-plot for factor levels

Description

Draws a QQ-plot of a numeric variable per level of a factor.

Usage

byf.qqnorm(formula, data, ...)

Arguments

formula

a formula of the form a ~ b where a gives the data values and b a factor giving the corresponding groups.

data

an optional data frame containing the variables in the formula formula. By default the variables are taken from environment(formula).

...

other arguments to pass to qqPlot.

Author(s)

Maxime HERVE <[e-mail]>

See Also

link[RVAideMemoire]{byf.shapiro}, qqPlot

Examples

data(iris)
byf.qqnorm(Sepal.Length~Species,data=iris)