[R] Shading underneath a line plot.

Greg Snow Greg.Snow at imail.org
Sat Oct 25 06:44:05 CEST 2008

Is this what you want?

mydata <- c(268,251,254,250,244,246,247,243,241,243)
plot(mydata, type="o")
polygon( c( 1, 1:length(mydata), length(mydata) ), c(0,mydata,0), col='red')

I could not see your original plot since we don't know what ppp is.

Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Alastair Andrew
> Sent: Friday, October 24, 2008 10:17 AM
> To: r-help at r-project.org
> Subject: [R] Shading underneath a line plot.
> Hi,
> 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?
> Thanks,
> Alastair
> --
> View this message in context: http://www.nabble.com/Shading-underneath-
> a-line-plot.-tp20153115p20153115.html
> Sent from the R help mailing list archive at Nabble.com.
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