[BioC] Class Library Problem

Moore, Stephen Stephen.Moore at arragen.com
Thu Jun 17 18:06:57 CEST 2004

Dear all,

We have been investigating various ways of carrying out supervised clustering analysis in R.  We have been  working through the 'machine learning lab' manual and under the section of k nearest neighbours, there are example commands as shown below:

> library(class)
> knn1<-knn(t(expres(trainSet)),t(exprs(testSet)),trainY,k=1)

When we type these commands within R we get the following error message:

"Error in t(expres(trainSet)) : couldn't find function "expres"."

Is this a case of example commands and that the datasets to which it is referring do not actually exist or is there a problem on our part.  Does anyone know of examples that have datasets that we can practice on?

For reference we are using R version 1.9.0 and the library CLASS is the latest release.

Many Thanks for your time and help.

Stephen Moore

Dr. Stephen Moore
Senior Scientist
ArraGen Ltd.
Almac House
Seagoe Industrial Estate
Co. Armagh
BT63 5QD
Northern Ireland
E-mail:Stephen.Moore at arragen.com
Phone: 02838 395751
Mobile: 07719 989348
Fax:     02838 398676

This e-mail is from ArraGen Ltd

The e-mail and any files transmitted with it are confidential and privileged and intended solely for the use of the individual or entity to whom they are addressed. 

Any unauthorised direct or indirect dissemination, distribution or copying of this message and any attachments is strictly prohibited. 

If you have received the e-mail in error please notify helpdesk at arragen.com or telephone +44 28 38 363841 and delete the e-mail from your system.

E-mail and other communications sent to this company may be reviewed or read by persons other than the intended recipient.

Viruses : although we have taken steps to ensure that this e-mail and any attachments are free from any virus, you should, in keeping with good practice, ensure that they are actually virus free.

ArraGen Ltd. Registration Number NI 43067
Registered Address :  Almac House, 20 Seagoe Industrial Estate, Craigavon, BT63 5QD

More information about the Bioconductor mailing list