[R] simple ts plot question

[Francisco Cribari Neto]

Hi, I have a simple question regarding plots of time series. I 
have two time series, say ts1.ts and ts2.ts. They are both monthly. 
The first one ranges from 1944:2 through 1999:7 whereas the second 
one ranges from 1974:1 through 1993:6. How can I plot both of them 
in the same plot (the shorther series would be only displayed in a 
section of the x axis since it is shorter). 

My naive try was 

plot(c(ts1.ts, ts2.ts), xlab="time", ylab="")

but it did not work. Note: I have defined the two series as 

ts1.ts <- ts(series1, start=c(1944,2), frequency=12) # 234 obs. 
ts2.ts <- ts(series2, start=c(1974,1), frequency=12) # 666 obs. 

Thanks a lot in advance. Best, Francisco. 

PS: I am using R for Windows and R for (Red Hat) Linux version 
1.0.0. 

Francisco Cribari-Neto               voice: +55-81-2718420
Departamento de Estatistica          fax:   +55-81-2718422
Universidade Federal de Pernambuco   e-mail: cribari at de.ufpe.br
Recife/PE, 50740-540, Brazil         web: www.de.ufpe.br/~cribari/

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