Re: [R] Thinking about using two y-scales on your plot?

From: Jim Lemon <jim_at_bitwrit.com.au>
Date: Tue, 08 Apr 2008 18:43:27 +1000

Johannes Hüsing wrote:

> Am 07.04.2008 um 12:24 schrieb Richard Cotton:
> 

>>thegeologician wrote:
>>
>>>Of course, these plots could be plotted separately with a common
>>>x-axis,
>>>it's just a matter of saving space and of being used to that kind of
>>>graph. I can't imagine anyone being falsely lead to a thought like "oh
>>>gosh, the temperature is much higher/bigger/more than the
>>>precipitation!" - that makes no sense.
>>
>>I think in the temperature/ precipitation case, whether to draw
>>multiple
>>y-axes or not is a fairly minor decision. The reader would have to be
>>pretty dumb to assume that temperatures and precipitations can be
>>compared.
>>
> 
> Au contraire, the diagrams are set up to allow this comparison. Google 
> for
> "Walter Lieth" for details.
> 

A rather neat way of displaying the relationship between the two measures, but I am somewhat bemused by the coexistence of "relative humid season" and "relative drought". I would have thought there was some temperature/precipitation function that specified one or the other.

Jim



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