panel.levelplot {lattice} | R Documentation

## Default Panel Function for levelplot

### Description

This is the default panel function for `levelplot`.

### Usage

    panel.levelplot(x, y, z, zcol,
                    subscripts,
                    at = mean(z),
                    shrink,
                    labels = NULL,
                    label.style = c("mixed", "flat", "align"),
                    contour = TRUE,
                    region = TRUE,
                    col = add.line$col,
                    lty = add.line$lty,
                    lwd = add.line$lwd,
                    cex = add.text$cex,
                    font = add.text$font,
                    fontfamily = add.text$fontfamily,
                    fontface = add.text$fontface,
                    col.text = add.text$col,
                    ...,
                    col.regions)

### Arguments

`x, y, z` | variables defining the plot
`zcol` | color numbers for each x,y combination, used as indices for the color vector `col.regions`
`subscripts` | which points of `x,y,z` to draw
`at` | numeric vector specifying cut points

`shrink`

either a numeric vector of length 2 (meant to work as both x and y components), or a list with components x and y which are numeric vectors of length 2. This allows the rectangles to be scaled proportional to the z-value. The specification can be made separately for widths (x) and heights (y). The elements of the length 2 numeric vector gives the minimum and maximum proportion of shrinkage (corresponding to min and max of z).

`labels` | contour labels
`label.style` | controls choice of how label positions are determined.
`contour` | logical, specifying whether contour lines should be drawn
`region` | logical, specifying whether inter-contour regions should be filled with the appropriate color
`col, lty, lwd` | graphical parameters for contour lines
`cex, col.text, font, fontfamily, fontface` | graphical parameters for contour labels
`...` | extra parameters
`col.regions` | colors indexed by zcol, used if `region=TRUE`

### Details

The same function is used for both `levelplot` and `contourplot` (which differ only in default values of some arguments).

When `contour=TRUE`, the `contourLines` function is used to calculate the contour lines.

### Author(s)

Deepayan Sarkar deepayan@stat.wisc.edu

### See Also

`levelplot`, `contourLines`

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