[R] Shading underneath a line plot.

Alastair Andrew alastair.andrew at cis.strath.ac.uk
Fri Oct 24 18:17:28 CEST 2008


I'm sure this should be fairly simple to do but I haven't found an example.
I have 10 data points which are plotted as a line, I want to shade under
this line with a colour. Other examples have shading under curves where
there are two sets of data use polygons. 

mydata <- c(268,251,254,250,244,246,247,243,241,243)
plot(mydata, type="o")
polygon(c(ppp$total,length(ppp$total)), col="red")

This gives me almost what I want but the line from the x-axis up to the
first point on the line is squint. Could anyone suggest how to create my
polygon so that it correctly shades underneath the line?

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