[R] Plot Rect Transparency

[Jeff Reichman]

R-Help

 

Is there a way to make a rectangle transparent (alpha=0.1??)

 

  plot(c(100, 200), c(300, 450), type= "n", xlab = "", ylab = "")

   rect(110, 300, 175, 350, density = 5, border = "red")

 

Can't figure out how to take the changepoint function results and plot in
ggplot2 so I can just simply add rectangles to the plot function, but I need
to make transparent and there doesn't seem to be an alpha option.

 

Jeff


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