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p2c
2010 Nov 20
1
Grid newbie: aligning & scaling viewports
...it. Any hints much appreciated!
Bryan
*************
Bryan Hanson
Professor of Chemistry & Biochemistry
DePauw University, Greencastle IN USA
foobar <- function() {
# a couple of convenience functions before we begin:
p2cX <- function(r, theta) x <- r*cos(theta*2*pi/360)
p2cY <- function(r, theta) y <- r*sin(theta*2*pi/360)
vp <- viewport(x = 0.5, y = 0.5, width = 0.8, height = 0.8,
xscale = c(-5, 5), yscale = c(-5, 5))
grid.newpage()
pushViewport(vp)
grid.rect(gp = gpar(lty = "dashed", col = "gray")) # refe...