makeColorMatrix: Convert Raster to colour matrix usable by raster function for...
In quickPlot: A System of Plotting Optimized for Speed and Modularity

.makeColorMatrix

R Documentation

Convert Raster to colour matrix usable by raster function for plotting

Description

Internal function.

Usage

.makeColorMatrix(
  grobToPlot,
  zoomExtent,
  maxpixels,
  legendRange,
  cols = NULL,
  prevMinMax,
  na.color = "#FFFFFF00",
  zero.color = NULL,
  skipSample = TRUE
)

Arguments

`grobToPlot`	A `SpatialObject`.
`zoomExtent`	An `Extent` object for zooming to. Defaults to whole extent of `grobToPlot`.
`maxpixels`	Numeric. Number of cells to subsample the complete `grobToPlot`.
`legendRange`	Numeric vector giving values that, representing the lower and upper bounds of a legend (i.e., `1:10` or `c(1,10)` will give same result) that will override the data bounds contained within the `grobToPlot`.
`cols`	Colours specified in a way that can be understood directly or by `colorRampPalette()`.
`na.color`	Character string indicating the colour for `NA` values. Default transparent.
`zero.color`	Character string indicating the colour for zero values, when zero is the minimum value. Otherwise, it is treated as any other colour. Default transparent. Use `NULL` if zero should be the value given to it by the `colortable` associated with the raster.
`skipSample`	Logical. If no downsampling is necessary, skip. Default `TRUE`.