[R] Multiple series plot with different 'type' argument

From: Ruben Roa <RRoa_at_fisheries.gov.fk>
Date: Mon 25 Jul 2005 - 00:27:38 EST


Hi:
I need to plot two time series in the same plot and they cover the same time range and have the same frequency. With
RSiteSearch("multiple series plot")
i found this post by Gabor Grothendieck:
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/42281.html Exactly what i need except for one detail. I want one series to be made of points and the other by a line. When I simply try:
xts <- ts(x$b,start=x$a[1])
yts <- ts(y$b,start=y$a[1])
ts.plot(xts,yts,type=c("p","l"))
or if i use the 'type' argument inside gpars=list() i get an error of "invalid plot type".
Then if i try
ts.plot(xts,yts,type1="p",type2="l")
i get warnings about NAs introduced by coercion and the plot still shows two lines.
Is there any other way i can get these two time series in the same plot one with points and the other with lines? Any help much appreciated.
Ruben



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