superimposing graphs
On Fri, Apr 18, 2003 at 07:22:58PM -0400, Faheem Mitha wrote:
In the function below, I call truehist and curve, but these are plotted in different figures. I'd like them to be plotted on the same figure, and to use common axes, of course. Can anyone suggest a simple, robust way to do this? I'd prefer not to do micro-fiddling of graphical parameters if possible.
Here is one way with an estimated density function, IIRC more a less a copy of what is in MASS.
library(MASS) X<-rt(250,2) Xdensity <- density(X, width=width.SJ(X, method="dpi"), n=200) truehist(X, col="lightgray", ymax=max(Xdensity$y)) lines(Xdensity) title(main="Histogram and Density") box()
Peter has another solution in ISwR, but that may have been particular to a Normal distribution, and my copy is at work anyway. Hth, Dirk
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