[R] Help with displaying multiple data elements on one graph

[Sean O'Neill]

I'm interested if anyone can help me to the R to display multiple data 
elements on one graph - just a simple graph, nothing fancy.  I can't seem 
to find an example of this.  An example of what I'm looking for is, say, a 
CPU graph which graphs user, system, and idle time as a cumulative stack 
representing each data element as a different color.  See the following URL 
for an example of this graph generated by RRDtool (which is sort of a bad 
example as there is no idle time on my SS20):

http://chivas.seanoneill.info/orca/o_gauge_usr_pct,o_gauge_sys_pct,o_gauge_wio_pct,o_gauge_idle_pct-daily.html

Any help appreciated.


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Sean O'Neill

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