groupedBar: Grouped bar chart

Description

Create a bar chart of a single categorical variable or a grouped bar chart of two categorical variables.

Usage

groupedBar(resp, ...)
# S3 method for default
groupedBar(resp, condvar = NULL, percent = TRUE,
  print = TRUE, cond.name = deparse(substitute(condvar)),
  resp.name = deparse(substitute(resp)), ...)
# S3 method for formula
groupedBar(formula, data = parent.frame(), subset, ...)

Value

Returns invisibly a table of the variable(s).

Arguments

resp: a factor variable. If resp is numeric, it will be coerced to a factor variable.
...: further arguments to be passed to or from methods.
condvar: a factor variable to condition on. If NULL, then a bar plot of just the resp variable will be created. If condvar is numeric, it will be coerced to a factor variable.
percent: a logical value. Should the y-axis give percent or counts?
print: a logical value. If TRUE, print out the table.
cond.name: Label for variable condvar.
resp.name: Label for variable resp.
formula: a formula of the form x ~ condvar. If x or condvar is (are) not a factor variable, then it (they) will be coerced into one. Formula can also be ~ x for a single factor variable.
data: a data frame that contains the variables in the formula.
subset: an optional vector specifying a subset of observations to be used.

Methods (by class)

default: Grouped bar chart
formula: Grouped bar chart

Author

Laura Chihara

Details

For a single factor variable, a bar plot. If two factor variables are given, then a bar plot of x conditioned by condvar. This command uses R's table command so missing values are automatically removed.

Examples

Run this code



groupedBar(states03$Region)

groupedBar(states03$DeathPenalty, states03$Region, legend.loc = "topleft")

#Using a formula syntax:
groupedBar(~Region, data = states03)
groupedBar(DeathPenalty ~ Region, data = states03, legend.loc = "topleft")

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