Re: [R] norm package prelim.norm

From: Ted Harding <Ted.Harding_at_nessie.mcc.ac.uk>
Date: Thu 02 Feb 2006 - 02:44:38 EST


On 01-Feb-06 Elizabeth Lawson wrote:
> Hey eveyone! I hope someone can help wiht this question. I have a
> matirux of all zeros and ones and I would like to indentify all unique
> patterns in the rows andthe number of times the pattern occurs. I
> changed all zeros to NA tried to use prelim.norm to identify all
> patterns of missing data in the rows. I got the message
>
> Warning message:
> NAs introduced by coercion
>
> Any ideas of how to get this to work? Or are there any way to
> indentify all the unique patterns in a huge matrix? ( 10000 x 71)
>
> Thanks for any suggestions!!
>
> Elizabeth Lawson

I think Chuck Celand has pretty well answered it: Don't worry about the warning, since I'm pretty sure it is generated when prelim.norm is calculating something else (e.g. the covariance matrix) and it is not related to generating prelim.norm(X)$r which is the list of patterns and the numbers of times they occur.

Best wsihes,
Ted.



E-Mail: (Ted Harding) <Ted.Harding@nessie.mcc.ac.uk> Fax-to-email: +44 (0)870 094 0861
Date: 01-Feb-06                                       Time: 15:44:34
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