F_2_panel.smoothScatter

From lattice v0.20-41 by Deepayan Sarkar

Lattice panel function analogous to smoothScatter

This function allows the user to place smoothScatter plots in lattice graphics.

Keywords: hplot

Usage

panel.smoothScatter(x, y = NULL,
                    nbin = 64, cuts = 255,
                    bandwidth,
                    colramp,
                    nrpoints = 100,
                    transformation = function(x) x^0.25,
                    pch = ".",
                    cex = 1, col="black",
                    range.x,
                    ...,
                    raster = FALSE,
                    subscripts,
                    identifier = "smoothScatter")

Arguments

x: Numeric vector containing x-values or n by 2 matrix containing x and y values.
y: Numeric vector containing y-values (optional). The length of x must be the same as that of y.
nbin: Numeric vector of length 1 (for both directions) or 2 (for x and y separately) containing the number of equally spaced grid points for the density estimation.
cuts: number of cuts defining the color gradient
bandwidth: Numeric vector: the smoothing bandwidth. If missing, these functions come up with a more or less useful guess. This parameter then gets passed on to the function bkde2D.
colramp: Function accepting an integer n as an argument and returning n colors.
nrpoints: Numeric vector of length 1 giving number of points to be superimposed on the density image. The first nrpoints points from those areas of lowest regional densities will be plotted. Adding points to the plot allows for the identification of outliers. If all points are to be plotted, choose nrpoints = Inf.
transformation: Function that maps the density scale to the color scale.
pch, cex: graphical parameters for the nrpoints “outlying” points shown in the display
range.x: see bkde2D for details.
col: points color parameter
…: Further arguments that are passed on to panel.levelplot.
raster: logical; if TRUE, panel.levelplot.raster is used, making potentially smaller output files.
subscripts: ignored, but necessary for handling of … in certain situations. Likely to be removed in future.
identifier: A character string that is prepended to the names of grobs that are created by this panel function.

Details

This replicates the display part of the smoothScatter function by replacing standard graphics calls by grid-compatible ones.

Value

The function is called for its side effects, namely the production of the appropriate plots on a graphics device.

Examples

# NOT RUN {
ddf <- as.data.frame(matrix(rnorm(40000), ncol = 4) + 3 * rnorm(10000))
ddf[, c(2,4)] <- (-ddf[, c(2,4)])
xyplot(V1 ~ V2 + V3, ddf, outer = TRUE,
       panel = panel.smoothScatter, aspect = "iso")
splom(ddf, panel = panel.smoothScatter, nbin = 64, raster = TRUE)

# }

Documentation reproduced from package lattice, version 0.20-41, License: GPL (>= 2)

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