[BioC] classifier using R

Naomi Altman naomi at stat.psu.edu
Sun Jun 25 16:21:08 CEST 2006

Are the data all numeric?  Are you saving the xls file as 
comma-limited or tab delimited.

If the data include characters, you should be aware that some 
characters such as spaces and slashes in the columns might cause 
problems.  I always use a global search to remove these characters.

The most robust way to read the data is to save as tab delimited and 
use read.delim.


At 01:36 PM 6/23/2006, Nadege Nana wrote:
>I' trying to write a classifier usisn R
>     I have microarray data(.xls), i saved the data as   .txt, and 
> import them in R with read.table()
>     I  first tried to calcute knn: but i always receive the 
> failure: Data have  differents length, when i check their Length 
> there are same.
>      How kann i calculate one of these classifiers sing   R:
>     knn- classifier
>     Bayes-classifer
>     Hidden Markov Modell
>     Neural net
>     Thanks for your help
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Naomi S. Altman                                814-865-3791 (voice)
Associate Professor
Dept. of Statistics                              814-863-7114 (fax)
Penn State University                         814-865-1348 (Statistics)
University Park, PA 16802-2111

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