Description Usage Arguments Details Value Author(s) Examples

This function creates a qq-plot with a confidence interval.

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`x` |
A vector containing the values to plot. |

`distribution` |
The distribution to (a 'd' and 'q' are prepended, and the resulting functions are used, e.g. |

`...` |
Any additional arguments are passed to the quantile function (e.g. |

`ci` |
Whether to show the confidence interval. |

`line.estimate` |
Whether to show the line showing the match with the specified distribution (e.g. the normal distribution). |

`conf.level` |
THe confidence of the confidence leven arround the estimate for the specified distribtion. |

`sampleSizeOverride` |
It can be desirable to get the confidence intervals for a different sample size (when the sample size is very large, for example, such as when this plot is generated by the function |

`observedOnX` |
Whether to plot the observed values (if |

`scaleExpected` |
Whether the scale the expected values to match the scale of the variable. This option is provided to be able to mimic SPSS' Q-Q plots. |

`theoryLab` |
The label for the theoretically expected values (on the Y axis by default). |

`observeLab` |
The label for the observed values (on the Y axis by default). |

`theme` |
The theme to use. |

This is strongly based on the answer by user Floo0 to a Stack Overflow question at Stack Exchange (see http://stackoverflow.com/questions/4357031/qqnorm-and-qqline-in-ggplot2/27191036#27191036), also posted at GitHub (see https://gist.github.com/rentrop/d39a8406ad8af2a1066c). That code is in turn based on the `qqPlot`

function from the `car`

package.

A `ggplot`

plot is returned.

John Fox and Floo0; implemented in this package (and tweaked a bit) by Gjalt-Jorn Peters.

Maintainer: Gjalt-Jorn Peters <[email protected]>

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