| breaks.grid {gbm.auto} | R Documentation |
Defines breakpoints for draw.grid and legend.grid; mapplots fork
Description
Defines breakpoints from values in grd with options to exclude outliers, set number of bins, and include a dedicated zero column. Forked by SD 05/01/2019 to add 'lo', else bins always begin at 0, killing plotting when all data are in a tight range at high values e.g. 600:610
Usage
breaks.grid(grd, quantile = 0.975, ncol = 12, zero = TRUE)
Arguments
grd |
An array produced by make.grid or a list produced by make.multigrid or a vector of positive values. |
quantile |
The maximum value of the breaks will be determined by the quantile given here. This can be used to deal with outlying values in grd. If quantile = 1 then the maximum value of the breaks will be the same as the maximum value in grd. |
ncol |
Number of colours to be used, always one more than the number of breakpoints. Defaults to 12. |
zero |
Logical, should zero be included as a separate category? Defaults to TRUE. |
Value
A vector of breakpoints for draw.grid in mapplots
Author(s)
Simon Dedman, simondedman@gmail.com
Hans Gerritsen
Examples
breaks.grid(100,ncol=6)
breaks.grid(100,ncol=5,zero=FALSE)
# create breaks on the log scale
exp(breaks.grid(log(10000),ncol=4,zero=FALSE))