[R] Normality tests

[Peter Ehlers]

On 2011-04-26 13:15, Bruce Kindseth wrote:
> I have a large amount of data which I break down into a collection of
> vectors of 100-125 values each.  I would like to test the normality of the
> vectors and compare them.  In the interactive mode I can test any one vector
> using the Shapiro-Wilk test or the Kolmogorov-Smirnov test.  My problem is
> that when I try to write out the results to a file, the term output is a
> mixture of alpha characters along with the number value that I really want.
> How can I get it to write out just the p-values by themselves?

Try

   shapiro.test(rnorm(100))$p.value

Put all your p.values into a vector and write that out.

While you're at it, check ?str to see how handy the
str() function is in identifying the pieces of an R object.

Peter Ehlers

>
> Thank you very much for your time.
>
> Bruce Kindseth
>
>
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>
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