R: Graphic Representation of a Frequency Table

symbol.freq {Hmisc}

R Documentation

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

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)