# Plot a Histogram

### Description

This function is a wrapper for the `hist`

function in
the `base`

package, permitting percentage scaling of the
vertical axis in addition to frequency and density scaling.

### Usage

1 2 |

### Arguments

`x` |
a vector of values for which a histogram is to be plotted. |

`groups` |
a factor to create histograms by group with common horizontal and vertical scales. |

`scale` |
the scaling of the vertical axis: |

`xlab` |
x-axis label, defaults to name of variable. |

`ylab` |
y-axis label, defaults to value of |

`main` |
main title for graph, defaults to empty. |

`breaks` |
see the |

`...` |
arguments to be passed to |

### Value

This function returns `NULL`

, and is called for its side effect —
plotting a histogram.

### Author(s)

John Fox jfox@mcmaster.ca

### See Also

`hist`

### Examples

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