[R] Secondary axis

jim holtman jholtman at gmail.com
Mon Aug 6 12:53:07 CEST 2007


On 8/5/07, Patrick Martin <pma.sts at sea.noc.soton.ac.uk> wrote:
> Dear R help list members,
> I am trying to plot two sets of data (both of which are zoo objects)
> in the same graph using two separate y-axes with different scales,
> with the x-axis consisting of dates. I have simply used a plot()
> command to plot first one set of data, and then added the second set
> with lines(). I have also tried to add a further y-axis (at side=4),
> but this simply comes up with the same scale as the first y-axis. I
> somehow need to 'associate' one of the data sets with the second y-
> axis, such that it will scale sensibly (my first data set ranges from
> 0-25, the second one from 0 to 40). The problem is compounded by the
> fact that the two data sets have very different frequencies: one
> consists of twice-monthly measurements, the other of hourly
> measurements. I would be very grateful for advice on how to do this.
> Thanks in advance,
> Patrick Martin
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Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?

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