search for: sagmb

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2010 Dec 27
1
R-code to generate random rotation matrix for rotation testing
...of independent standard-normal entries R <- matrix(rnorm(16),ncol=4) R <- qr.Q(qr(R, LAPACK = TRUE)) # Z shall be a random matrix with the same mean and covariance structure as Y Z <- crossprod(R,Y) } ##### A suggestion for the procedure exists (in Dorum et al. http://www.bepress.com/sagmb/vol8/iss1/art34/ , end of chapter 2.1), but a hint to a (fast) implementation would be greatly appreciated. Best regards and a happy new year, Martin Krautschke ----------------------- Martin Krautschke Student at University of Vienna -- Sicherer, schneller und einfacher. Die aktuellen Inter...
2007 Sep 03
0
buglet?? in nlme:::corRatio documentation
...and Rudemo, Mats}, title = {Pixel-level Signal Modelling with Spatial Correlation for Two-Colour Microarrays}, journal = {Statistical Applications in Genetics and Molecular Biology}, year = {2005}, volume = {4}, number = {1} timestamp = {2007.09.03}, url = {http://www.bepress.com/sagmb/vol4/iss1/art6} }
2008 Jul 14
1
Analysis of poorly replicated array data
Greetings, I have "inherited" a cDNA macroarray dataset that is structured as follows. Three different stressors were tested. For each stressor, there are two treatments (control and stressed). For each treatment, two biological replicates exist, and these are paired (i.e., there is a stressed array for colony A and a control array from this same colony). For one of these samples,