SPGDF2matrix {RgoogleMaps}R Documentation

image gridded spatial data, or convert to format for image

Description

This is a modification/ripoff from as.image.SpatialGridDataFrame() in package sp. It merely serves to convert an object of type SpatialGridDataFrame to a matrix

Usage

SPGDF2matrix(x, xcol = 1, ycol = 2, col = heat.colors(12), red = 1, green = 2, blue = 3, axes = FALSE, xlim = NULL, ylim = NULL, add = FALSE, PLOT = FALSE, ..., asp = NA, setParUsrBB = FALSE)

Arguments

x object of class SpatialGridDataFrame
xcol column number of x-coordinate, in the coordinate matrix
ycol column number of y-coordinate, in the coordinate matrix
col a vector of colors
red,green,blue columns names or numbers given instead of the attr argument when the data represent an image encoded in three colour bands on the 0-255 integer scale; all three columns must be given in this case, and the attribute values will be constructed using function rgb
axes logical; should coordinate axes be drawn?
xlim x-axis limits
ylim y-axis limits
add logical; if FALSE, the image is added to the plot layout setup by plot(as(x, "Spatial"),axes=axes,xlim=xlim,ylim=ylim,asp=asp) which sets up axes and plotting region; if TRUE, the image is added to the existing plot.
PLOT plot, yes/no?
... arguments passed to image, see examples
asp aspect ratio to be used for plot
setParUsrBB default FALSE, see Spatial-class for further details

Author(s)

Markus Loecher, Sense Networks <markus@sensenetworks.com>


[Package RgoogleMaps version 1.1.6 Index]