Using oligo to do rma, I end up with an expression set object whose elements are in log2 space. Is there some quick way to unlog (square) them to get absolute intensity values back? Andrew [[alternative HTML version deleted]]

Hi Andrew, I am not using oligo but if you have an ExpressionSet object xs containing data on log2 scale, then the values on linear scale will simply be 2^exprs(xs) Note that this is exponentiation not squaring: 2^x and not x^2. Cheers, - axel Axel Klenk Research Informatician Actelion Pharmaceuticals Ltd / Gewerbestrasse 16 / CH-4123 Allschwil / Switzerland From: Andrew Einhorn <andreweinhorn at="" gmail.com=""> To: bioconductor at stat.math.ethz.ch Date: 15.09.2010 09:03 Subject: [BioC] squaring each element of an expression set Sent by: bioconductor-bounces at stat.math.ethz.ch Using oligo to do rma, I end up with an expression set object whose elements are in log2 space. Is there some quick way to unlog (square) them to get absolute intensity values back? Andrew [[alternative HTML version deleted]] _______________________________________________ Bioconductor mailing list Bioconductor at stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/bioconductor Search the archives: http://news.gmane.org/gmane.science.biology.informatics.conductor The information of this email and in any file transmitted with it is strictly confidential and may be legally privileged. It is intended solely for the addressee. If you are not the intended recipient, any copying, distribution or any other use of this email is prohibited and may be unlawful. In such case, you should please notify the sender immediately and destroy this email. The content of this email is not legally binding unless confirmed by letter. Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorised to state them to be the views of the sender's company. For further information about Actelion please see our website at http://www.actelion.com