stemPlot: Stem and leaf plot

Description

Stem and leaf plot. Will accept a factor variable as a second argument to create stem plots for each of the levels.

Usage

stemPlot(x, ...)
# S3 method for default
stemPlot(x, grpvar = NULL, varname = NULL, grpvarname = NULL, ...)
# S3 method for formula
stemPlot(formula, data = parent.frame(), subset, ...)

Arguments

x: a numeric variable.
...: further arguments to be passed to or from methods.
grpvar: a factor variable. A stem plot of x will be created for each level of the factor variable.
varname: name of the numeric variable. This is for printing the output only. Change if you want to print out a name different from the actual variable name.
grpvarname: name of the factor variable. This is for printing the output only. Change if you want to print out a name different from the actual variable name.
formula: a formula of the form x ~ grpvar where x is numeric and grpvar is a factor variable.
data: a data frame with the variables in the formula.
subset: an optional expression specifying which observations to keep.

Methods (by class)

stemPlot(default): Stem and leaf plot
stemPlot(formula): Stem and leaf plot

Author

Laura Chihara

Details

This command is just an enhanced version of R's stem command. It allows the user to create the stem plot for a numeric variable grouped by the levels of a factor variable.

Examples

Run this code



stemPlot(states03$Births, states03$Region)

stemPlot(Births ~ Region, data = states03)

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