You should probably use the Kolmogorov-Smirnov test or similar test to determine if 2 distributions are equal. l think you need independent samples, so what you should do is create vector 3 - the length of all genes NOT identified from the microarray experiment and compare 2 to 3. However, the fairness of this depends on what you mean by "identified". If you mean genes that were selected using the microarray array results, I would use the lengths only of the genes actually on the array. --Naomi At 07:57 AM 8/20/2006, Sean Davis wrote: >Marco Blanchette wrote: > > Dear All, > > > > I have two vectors of different size containing, in vector 1, the length of > > all genes from a genome and, in vector 2, the length of the genes > identified > > in a microarray experiment. My goal is two draw a relative distribution of > > the gene size of the two population of genes. > > > > Is there an easy way to compute and draw such relative distributions? > > > >You might look at ?hist, ?density, ?boxplot, and many others. > >Sean > >_______________________________________________ >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 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