[R] how to you use plot to plot multiple time series in one final gra ph

Miller, Shane CONT shane.miller at capitalone.com
Mon Nov 26 21:48:20 CET 2001



| =========================== A
| *************************** B

in this contrived example there are two
series A,B plotted against time. (x axis
is time)

problem: if the range for A and B are
quite different R goes stupid and only
shows either A or B but not both (depending
on what plot command came last i think). 

how do you fix that? 

i played around with all sorts of things
on plot including this last stab:

A <- c(...)
B <- c(...)
# using code NOT shown here I figure out the
# min, maxes for the X axis and therefore
# determine the right at and lab arguments
# for axis
axis(2,at...) # ditto for Y

I can routinely get R to do a nice job with the
X axis with above code BUT not Y. in the axis(2...)
command the graphics line for the Y axis in the
plot window goes DOWN beneath the X axis even
though all Y lables are positive.

R is too smart to be this crazy? what is my pilot

i hesitate to ask (and this is NOT my burning
question) but what would happen if A and B had
different units. can you make R plot A against the
left hand side Y axis and B against the right 
hand side axis with appropriately labled and ticked?


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