Since you did not specify plotting limits (xlim, ylim) the plot-function
automatically sets them to the range of your data, extended by some
factor (depending on your axis style). If you draw another object
afterwards with "line" this limits are not altered.
So depending on the data range of the first object to be drawn your
final result will be clipped to that actual range.
So
plot(pre.den, xlim=c(-5,30))
lines(cdata.den,col = 1)
should correct the x-axis. You may notice, that this automatic process
also applies to the y-axis, so
yl<-range(pre.den$y,cdata.den$y)
plot(pre.den, xlim=c(-5,30),ylim=yl)
lines(cdata.den,col = 1)
should produce the desired plot.
hth.
Stephen Collins schrieb:
In the following code, the only difference between the two plots is the
order the variables are plotted. In this case, the plot of "cdata.den" in
plot #1 is different from its plot in #2. Specifically, "cdata.den" spans
the x-axis from -5 to 30 in plot #1 and from 0 to 20 in plot #2. Does
anyone understand why these two plots do not yield the same result?
#Make density objects
pre.den<- density(
preclaims[preclaims[,7]>cc1 & preclaims[,7]<cc2,7],
from = cc1,
to = cc2)
cdata.den<-density(cdata,from=cc1,to=cc2)
#Plot No. 1
x11()
plot(cdata.den,col=1)
lines(pre.den,col=2)
#Plot No. 2
plot(pre.den,col=2)
lines(cdata.den,col = 1)
Regards,
Stephen Collins, MPP | Analyst
Health & Benefits | Aon Consulting
200 East Randolph, Suite 900, Chicago, IL
Tel: 312-381-2578 | Fax: 312-381-0136
Email: [EMAIL PROTECTED]
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Institut für Medizinische Biometrie und Epidemiologie
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