[R] Shapiro-Wilk test problem

[Greg Hirson]

Trafim,

Could you please provide an example of the data?

I don't believe the sample size to be the driver of the issue you are 
having.

For example,

set.seed(20)
x <- rnorm(100)
shapiro.test(x)

returns no error and a p value of 0.5519.

Sample (or actual) data would be helpful in diagnosing the problem.

Greg

On 2/18/10 6:32 AM, Trafim Vanishek wrote:
> Hi everybody,
>
> Does anyone know what problem may be with this test.
> I am applying 5 different normality tests and use p-values for them, but for
> some reason S-W gives me NA, while sample size is 100.
>
> Any ideas?
>
> Thanks a lot!
>
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-- 
Greg Hirson
ghirson at ucdavis.edu

Graduate Student
Agricultural and Environmental Chemistry

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