R/generate.at.final.R

In BoutrosLab.plotting.general: Functions to Create Publication-Quality Plots

# The BoutrosLab.plotting.general package is copyright (c) 2011 Ontario Institute for Cancer Research (OICR)
# This package and its accompanying libraries is free software; you can redistribute it and/or modify it under the terms of the GPL
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### FUNCTION TO SET CUSTOM TICK MARK LOCATIONS ####################################################
generate.at.final <- function(at.input, limits, data.vector) {

	at.final <- NULL;

	if (is.numeric(at.input)) {
		at.final <- at.input;
		}
	else {
		if (is.null(limits)) {
			# making the range slightly larger than the at range
			# this allows grid-lines to appear, rather than merge into the axes
			extended.range <- range(data.vector) + 0.1 * (max(data.vector) - min(data.vector)) * c(-1, 1);
			at.final <- pretty(lattice.options()$default.args$xscale.components(extended.range)$bottom$ticks$at);
			}
		else {
			at.final <- pretty(x = limits);
			}
		}

	return(at.final);
	}