R: Plot a Histogram

truehist {MASS}

R Documentation

Plot a Histogram

Description

Creates a histogram on the current graphics device.

Usage

truehist(data, nbins = "Scott", h, x0 = -h/1000,
         breaks, prob = TRUE, xlim = range(breaks),
         ymax = max(est), col,
         xlab = deparse(substitute(data)), bty = "n", ...)

Arguments

`data`	numeric vector of data for histogram. Missing values (`NA`s) are allowed and omitted.
`nbins`	The suggested number of bins. Either a number, or a character string naming a rule: `"Scott"` or `"Freedman-Diaconis"` or `"FD"`. (Case is ignored.)
`h`	The bin width (takes precedence over `nbins`).
`x0`	Shift for the bins - the breaks are at `x0 + h * (..., -1, 0, 1, ...)`
`breaks`	The set of breakpoints to be used. (Usually omitted, takes precedence over `h` and `nbins`).
`prob`	If true (the default) plot a true histogram. The vertical axis has a relative frequency density scale, so the product of the dimensions of any panel gives the relative frequency. Hence the total area under the histogram is 1 and it is directly comparable with most other estimates of the probability density function. If false plot the counts in the bins.
`xlim`	The limits for the x-axis.
`ymax`	The upper limit for the y-axis.
`col`	The colour number for the bar fill.
`xlab`	label for the plot x-axis. By default, this will be the name of `data`.
`bty`	The box type for the plot - defaults to none.
`...`	additional arguments to `rect` or `plot`.

Details

This plots a true histogram, a density estimate of total area 1. If breaks is specified, those breakpoints are used. Otherwise if h is specified, a regular grid of bins is used with width h. If neither breaks nor h is specified, nbins is used to select a suitable h.

Side Effects

A histogram is plotted on the current device.

References

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.