[R] e1071::skewness and psych::skew return NaN

[Stephen Politzer-Ahles]

Hi everyone,

Please disregard my last message, I found a 0 in the vector, which is
what was causing problems with the log and reciprocal data.

Best,
Steve

On Wed, Feb 13, 2013 at 10:55 AM, Stephen Politzer-Ahles
<politzerahless at gmail.com> wrote:
> Hello everyone,
>
> Does anyone know what would cause the skewness() function (from
> e1071), as well as skew() from psych, to return a value of NaN?
>
> I have a vector of positively-skewed data
> (https://docs.google.com/file/d/0B6-m45Jvl3ZmYzlHRVRHRURzbVk/edit?usp=sharing)
> which these functions return a value for like normal:
>
>> skewness( data ) # returns 1.400405
>
> but when I instead give those functions the log-transformed data they return NaN
>
>> skewness( log( data ) ) #returns NaN
>
> The same occurs when I feed the function data transformed by reflected
> reciprocal
>
>> skewness( max(data) - 1/data ) ) #returns NaN
>
> The vector has no missing values (and if it did, I would get NA rather
> than NaN, and the function wouldn't return a number when I give it the
> raw data).
>
> Best,
> Steve
>
> --
> Stephen Politzer-Ahles
> University of Kansas
> Linguistics Department
> http://people.ku.edu/~sjpa/



-- 
Stephen Politzer-Ahles
University of Kansas
Linguistics Department
http://people.ku.edu/~sjpa/