tigerstats (version 0.1.6)

barchartGC: Easy barcharts from raw and tabular data

Description

Wrapper for barchart in package lattice. Creates a barchart from raw data, using formula-data syntax similar to that of xtabs. There are very few options.

Usage

barchartGC(x,data=parent.frame(),type="frequency",main=NULL)

Arguments

x

Either a formula or an object that can be coerced to a table. If formula, it must be of the form ~var or ~var1+var2.

data

Usually a data frame that supplies the variables in x. Variables not in the data argument are searched for in the parent environment.

type

Possible values are "frequency" and "percent".

main

An optional title

Value

• A trellis object describing the barchart.

Examples

#barchart of counts for one factor variable:
barchartGC(~sex,data=m111survey)

#barchart with percentages and title:
barchartGC(~sex,data=m111survey,
   type="percent",
   main="Distribution of Sex")

#barchart of counts, to study the relationship between
#two factor variables:
barchartGC(~sex+seat,data=m111survey)

#percentage barchart, two factor variables:
barchartGC(~sex+seat,data=m111survey,type="percent")

#From tabulated data:
sexseat <- xtabs(~sex+seat,data=m111survey)
barchartGC(sexseat,type="percent",main="Sex and Seating Preference")

#from tabulated data:
dieTosses <- c(one=8,two=18,three=11,four=7,five=9,six=7)
barchartGC(dieTosses,main="60 Rolls of a Die")