Dear all, I have a MA plot for "replicate" single channnel arrays, the loess curve is aligned to M=0. However, I expect that M values be as close as possible to M=0 for replicate arrays, which is not the case. How may I obtain a measure that indicates the average distance of points to M=0? Thanks indeed. -- View this message in context: http://r.789695.n4.nabble.com/Weired-location-of-points-on-MA-plot-tp4610624.html Sent from the R help mailing list archive at Nabble.com.