Example in The R Programming Language
library(affy) if (require(affydata)) { data(Dilution) } y <- (exprs(Dilution)) x11 ma.plot( rowMeans(log2(y)), log2(y)-log2(y), cex=1 ) title("Dilutions Dataset (array 20B v 10A)") library(preprocessCore) #do a quantile normalization x <- normalize.quantiles(y) x11 ma.plot( rowMeans(log2(x)), log2(x)-log2(x), cex=1 ) title("Post Norm: Dilutions Dataset (array 20B v 10A)") Post Normalization MA Plots.Read more about this topic: MA Plot
Famous quotes containing the words programming and/or language:
“If there is a price to pay for the privilege of spending the early years of child rearing in the driver’s seat, it is our reluctance, our inability, to tolerate being demoted to the backseat. Spurred by our success in programming our children during the preschool years, we may find it difficult to forgo in later states the level of control that once afforded us so much satisfaction.”
—Melinda M. Marshall (20th century)
“The great pines stand at a considerable distance from each other. Each tree grows alone, murmurs alone, thinks alone. They do not intrude upon each other. The Navajos are not much in the habit of giving or of asking help. Their language is not a communicative one, and they never attempt an interchange of personality in speech. Over their forests there is the same inexorable reserve. Each tree has its exalted power to bear.”
—Willa Cather (1873–1947)