Creates a prettier histogram for discrete distributions

1 2 3 |

`x` |
The vector of x's |

`prob` |
The probabilities for the x's |

`prob2` |
A second vector of probabilities of the x's |

`prob3` |
A third vector of probabilities of the x's |

`xlab` |
Label for the x axis |

`xaxs.label` |
Label for the x's |

`yaxs.label` |
Label for the y axis |

`bar.width` |
Width of the bars |

`freq` |
If TRUE, shows a frequency histogram as opposed to probability. |

`prob.col` |
The color of the first set of histogram bars. |

`prob2.col` |
The color of the second set of histogram bars. |

`prob3.col` |
The color of the third set of histogram bars. |

`...` |
Additional arguments passed to function |

This function displays a histogram for discrete probability distributions.

1 2 3 4 5 6 7 8 9 10 | ```
a <- c(3,4,0,0,5,1,1,1,1,0)
discrete.histogram (a)
x <- c(0,1,3,4,5)
p <- c(.3,.4,.1,.1,.1)
discrete.histogram (x,p)
x <- c(0,1,3,4,5)
y <- c(3,4,1,1,1)
discrete.histogram (x,y)
``` |

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