panel.qqmathline {lattice} | R Documentation

## Useful panel function with qqmath

### Description

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.

### Usage

    panel.qqmathline(x, y = x,
                     distribution = qnorm,
                     p = c(0.25, 0.75),
                     qtype = 7,
                     groups = NULL,
                     ...)

### Arguments

`x` | The original sample, possibly reduced to a fewer number of quantiles, as determined by the `f.value` argument to `qqmath`
`y` | an alias for `x` for backwards compatibility
`distribution` | quantile function for reference theoretical distribution.
`p` | numeric vector of length two, representing probabilities. Corresponding quantile pairs define the line drawn.
`qtype` | the `type` of quantile computation used in `quantile`
`groups` | optional grouping variable. If non-null, a line will be drawn for each group.
`...` | other arguments.

### Author(s)

Deepayan Sarkar Deepayan.Sarkar@R-project.org

### See Also

`prepanel.qqmathline`, `qqmath`, `quantile`

[Package lattice version 0.13-8 Index]