[R] setting the values of a secondary "y" axis

Jim Lemon drjimlemon at gmail.com
Sun May 7 09:24:21 CEST 2017

Hi Antonio,
Have a look at twoord.plot (plotrix). It may make your repeated plots easier.


On Sun, May 7, 2017 at 7:50 AM, Antonio Silva <aolinto.lst at gmail.com> wrote:
> Hello
> I want to make a plot with two "y" axes. The labels at axis 4 should be the
> values from axis 2 multiplied by a scale factor (as 3.5).
> In the example below I draw axis 4 exactly as axis 2. But I could not find
> a way to multiply its values by 3.5 (e.g.).
> plot(rnorm(100,30,5))
> axis(4) # I'd like to have these values multiplied by a scale factor
> I will produce plots for different data sets in a looping and y values will
> vary so I  cannot "freeze" axis 4 labels because they (values and scale
> factor) will vary  from plot to plot.
> Thanks in advance for any help. All the best.
> Antonio
>         [[alternative HTML version deleted]]
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