# truehist

From MASS v7.3-20
by Brian Ripley

##### Plot a Histogram

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 = "cyan",
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 positive integer, or a character string
naming a rule:
`"Scott"`

or`"Freedman-Diaconis"`

or`"FD"`

. (Case is ignored.) - h
- The bin width, a strictly positive number (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 c - xlim
- The limits for the x-axis.
- ymax
- The upper limit for the y-axis.
- col
- The colour for the bar fill: the default is colour 5 in the default Rpalette.
- 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.

##### See Also

*Documentation reproduced from package MASS, version 7.3-20, License: GPL-2 | GPL-3*

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