Description Usage Arguments Author(s) See Also

Useful panel function with qqmath. Draws a line passing through the points (usually) determined by the .25 and .75 quantiles of the sample and the theoretical distribution.

1 2 3 4 5 6 7 | ```
panel.qqmathline(x, y = x,
distribution = qnorm,
probs = c(0.25, 0.75),
qtype = 7,
groups = NULL,
...,
identifier = "qqmathline")
``` |

`x` |
The original sample, possibly reduced to a fewer number of
quantiles, as determined by the |

`y` |
an alias for |

`distribution` |
quantile function for reference theoretical distribution. |

`probs` |
numeric vector of length two, representing probabilities. Corresponding quantile pairs define the line drawn. |

`qtype` |
the |

`groups` |
optional grouping variable. If non-null, a line will be drawn for each group. |

`...` |
other arguments. |

`identifier` |
A character string that is prepended to the names of grobs that are created by this panel function. |

Deepayan Sarkar Deepayan.Sarkar@R-project.org

`prepanel.qqmathline`

,
`qqmath`

,
`quantile`

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