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# Problem 1
data(ALL) # 12635 gene expression values for 128 different persons
patientB <- factor(ALL$BT %in% c("B","B1","B2","B3","B4"))
patientT <- factor(ALL$BT %in% c("T","T1","T2","T3","T4"))
ALL.fac <- as.numeric(patientB)
# ALL.fac=1 for T-cell patients and ALL.fac=2 for B-cell patients.
apply(exprs(ALL[1:3,]), 1, hist)
pairs( t(exprs(ALL[1:5,])) ,col=ALL.fac)...
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