User: Johannes Freudenberg

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13 years ago
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15 years, 5 months ago
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Posts by Johannes Freudenberg

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tasks of Background Correction and PM Corr =?iso-8859-15?q?ection_in_Prepro
... I'm not sure if there is such a thing as a "correct" definition. A formal definition -by definition- cannot be correct or incorrect. Anyways, the purposes of Background Correction and PM Correction, respectively, are indeed very similar. They are designed to estimate non-specific signal contributio ...
microarray preprocessing probe written 13.0 years ago by Johannes Freudenberg30
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Answer: A: table values
... Hi Daphne, can you convert q into a matrix using as.matrix()? For example: > q<-as.matrix(table(PL[,c(1,4)])) Also, you can always use apply() to make a quick-and-dirty for-loop. For example > x <- matrix(rnorm(100), 10) > apply(matrix(1:10), 1, function(i) mean(x[i,])) #row mean ...
written 13.2 years ago by Johannes Freudenberg30
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Answer: A: Installation of version 1.4: vsn
... I've had the same problem. I'm using R for Windows (version 1.9.0). To get the latest Version of VSN I manually downloaded the zip file (http://www.bioconductor.org/repository/release1.4/package/Win32/vsn_1 .4.13.zip) and installed it using the "Packages" menu: Packages -> Install package(s) fro ...
written 15.4 years ago by Johannes Freudenberg30

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