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


From   David Hoaglin <[email protected]>
To   [email protected]
Subject   Re: st: Transformation of variable with pos/neg values via asinh
Date   Tue, 19 Nov 2013 08:45:14 -0500

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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