symbol.freq: Graphic Representation of a Frequency Table

In harrelfe/Hmisc: Harrell Miscellaneous

Graphic Representation of a Frequency Table

Description

This function can be used to represent contingency tables graphically. Frequency counts are represented as the heights of "thermometers" by default; you can also specify symbol='circle' to the function. There is an option to include marginal frequencies, which are plotted on a halved scale so as to not overwhelm the plot. If you do not ask for marginal frequencies to be plotted using marginals=T, symbol.freq will ask you to click the mouse where a reference symbol is to be drawn to assist in reading the scale of the frequencies.

label attributes, if present, are used for x- and y-axis labels. Otherwise, names of calling arguments are used.

Usage

symbol.freq(x, y, symbol = c("thermometer", "circle"),
            marginals = FALSE, orig.scale = FALSE,
            inches = 0.25, width = 0.15, subset, srtx = 0, ...)

Arguments

x	first variable to cross-classify
y	second variable
symbol	specify "thermometer" (the default) or "circle"
marginals	set to TRUE to add marginal frequencies (scaled by half) to the plot
orig.scale	set to TRUE when the first two arguments are numeric variables; this uses their original values for x and y coordinates)
inches	see symbols
width	see thermometers option in symbols
subset	the usual subsetting vector
srtx	rotation angle for x-axis labels
...	other arguments to pass to symbols

Author(s)

Frank Harrell

See Also

symbols

Examples

## Not run: 
getHdata(titanic)
attach(titanic)
age.tertile <- cut2(titanic$age, g=3)
symbol.freq(age.tertile, pclass, marginals=T, srtx=45)
detach(2)

## End(Not run)

harrelfe/Hmisc documentation built on Nov. 21, 2024, 3:47 p.m.