[R] ggplot / second axis / just a notation problem

John miaojpm at gmail.com
Wed Oct 18 02:35:04 CEST 2017


Yes, I did. I should have posted the results here.
"~./5" works, but  "~.-3" does not. Multiplication and division should
work; I am wondering how I should present the plus and the minus in this
context.

Thanks,

John

2017-10-17 2:47 GMT-07:00 Eric Berger <ericjberger at gmail.com>:

> Hi John,
> Why not just try both and see which one makes sense?
>
>
> On Tue, Oct 17, 2017 at 12:24 PM, John <miaojpm at gmail.com> wrote:
>
>> Hi,
>>
>>    I have a question on ggplot2 with the second axis, but I don't think
>> one
>> needs to know ggplot2 package in order to answer this question.
>>
>>    In this example,
>> https://rpubs.com/MarkusLoew/226759
>>    since the transformation of the second axis is given by y1=y2*5,
>> #####
>>    p <- p + scale_y_continuous(sec.axis = sec_axis(~.*5, name = "Relative
>> humidity [%]"))
>> #####
>>    Note  "~.*5"
>>    What can I do if the transformation is given by y1=y2-3 or y1=y2/5?
>>    Should I write "~.-3" or "~./5"?
>>
>>    Thanks,
>>
>> John
>>
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>>
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>>
>
>

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