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Re: st: Transformation of variable with pos/neg values via asinh


From   Nick Cox <[email protected]>
To   "[email protected]" <[email protected]>
Subject   Re: st: Transformation of variable with pos/neg values via asinh
Date   Tue, 19 Nov 2013 14:00:10 +0000

Austin Nichols already reported that he finds odd integer roots
useful, and I am sure he uses real data (when he is not simulating)>

A group of us used the cube root to help visualise glacier movement data in

http://www.nature.com/nature/journal/v500/n7464/full/nature12382.html?WT.ec_id=NATURE-20130829
Nick
[email protected]


On 19 November 2013 13:45, David Hoaglin <[email protected]> wrote:
> Nick,
>
> The cube root can be applied, mechanically, to data that include
> negative values.  The question is whether it makes sense to apply the
> cube root to a particular set of such data.  I am open to realistic
> examples.
>
> David Hoaglin
>
> On Tue, Nov 19, 2013 at 8:16 AM, Nick Cox <[email protected]> wrote:
>> In case it's unclear to anyone
>>
>> (a) Cube roots can be useful for transforming amounts, not least if
>> the amount could be zero.
>>
>> (b) Cube roots -- much more unusually -- extend to negative quantities
>> too, just as (-2)(-2)(-2) = -8.
>>
>> The two positions
>> Nick
>> [email protected]
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