Enhancement: Individual plotting functions

[mboyas-mitre]

openVA/openVA/R/stackplot.r

Lines 131 to 140 in f16a333

	return(stackplot(x, grouping = grouping,
	type = type,
	order.group = order.group, order.sub = order.sub,
	err = err, CI = CI, sample.size.print = sample.size.print,
	xlab = xlab, ylab = ylab, ylim = ylim,
	title = title,
	horiz = horiz, angle = angle,
	err_width = err_width, err_size = err_size,
	point_size = point_size,
	border = border, bw = bw, ...))

insilico has its own plotting code that significantly simplifies this stackplot wrapper. We would recommend adding parallel codes to the individual InterVA, Tariff, etc. functions that parallel this, and then this stackplotVA function can become a true wrapper and call the individual functions. Doing so would (1) enable a user of one of the individual packages (but not openVA) to create the plots and (2) simplify the code housed in openVA for maintainability and readability.