Nothing
##==============================================================================
## emptyplot: open plot region for shape plotting
##==============================================================================
emptyplot <- function (xlim=c(0,1), ylim=xlim, asp=1,
frame.plot = FALSE, col=NULL, ...) {
plot(0, type = "n", xlab="", ylab = "", asp=asp, axes=FALSE,
frame.plot = frame.plot,
xlim = xlim, ylim = ylim, xaxs="i", yaxs="i", ...)
if ( ! is.null(col) )
rect(xlim[1], ylim[1], xlim[2], ylim[2], col=col)
}
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