latticeExtra: panel.segplot – R documentation

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latticeExtra

panel.segplot

Default prepanel and panel functions for segplot

Description

Draws line segments or rectangles. Mainly intended to be used in conjunction with the segplot function.

Usage

prepanel.segplot(x, y, z, subscripts, horizontal = TRUE, ...)

panel.segplot(x, y, z, level = NULL, subscripts, 
              at,
              draw.bands = is.factor(z),
              col, alpha, 
              lty, lwd,
              border,
              col.symbol = col, alpha.symbol = alpha,
              col.regions = regions$col,
              band.height = 0.6,
              horizontal = TRUE, 
              ...,
              segments.fun = panel.segments,
              centers = NULL,
              pch = 16)

Arguments

`x, y, z`	Vectors corresponding to `x1`, `x2` and `y` respectively in the `segplot` formula. The names are different for compatibility with `panel.levelplot`. These are all the original vectors in `data`, not subsetted for particular panels.
`level`	optional vector controlling color of segments
`centers`	optional vector of ‘centers’ of the segments. If specified, points will be plotted at these `y`-locations.
`pch`	plotting character used for `centers`.
`subscripts`	integer subscript to be used as an indexing vector for `x`, `y`, `z` and `level`, giving the packet for the current panel.
`horizontal`	logical, whether the segments are to be drawn horizontally (the default) or vertically. This essentially swaps the role of the x- and y-axes in each panel.
`at`	values of `level` where color code changes
`draw.bands`	logical, whether to draw rectangles instead of lines
`col, alpha, lty, lwd, border`	Graphical parameters for the segment. Defaults to parameter settings for `"plot.line"` or `"plot.polygon"` for segments and rectangles respectively. `col` is overridden by `col.regions` if `level` is not null.
`col.symbol, alpha.symbol`	Graphical parameters for the point if `centers` are plotted. Defaults to the corresponding parameters for the segment.
`col.regions`	vector of colors as in `levelplot`
`band.height`	height of rectangles (applicable if `draw.bands` is `TRUE`
`...`	Other arguments, passed on to `panel.rect` (when `draw.bands=TRUE`), `segments.fun` (otherwise), `panel.points` (if `centers` is not `NULL`), etc. as appropriate.
`segments.fun`	function used to plot segments when `draw.bands` is `FALSE`. The default is to use `panel.segments`, but `panel.arrows` is a useful alternative (arguments to `segments.fun` can be provided via the `...` argument, see example for `segplot`).

Value

For prepanel.segplot a list with components xlim and ylim.

Author(s)

Deepayan Sarkar deepayan.sarkar@r-project.org