gainLoss {aCGH} | R Documentation |
Function to compute proportion of gains and losses for each clones
Description
This function outputs lists containing proportion of gains and losses for each clone.
Usage
gainLoss(dat, cols, thres=0.25)
Arguments
dat |
log2ratios of the relevant array CGH object |
cols |
indeces of the samples to use |
thres |
global or tumor-specific threshold. defaults to 0.25 |
Value
gainP |
Vector of proportion gained for each clones |
lossP |
Vector of proportion lost for each clones |
Author(s)
Jane Fridlyand
See Also
plotFreqStat
Examples
data(colorectal)
## Use mt.maxT function from multtest package to test
## differences in group means for each clone grouped by sex
##use only clones with show gain or loss in at least 10% of the samples
colnames(phenotype(colorectal))
sex <- phenotype(colorectal)$sex
sex.na <- !is.na(sex)
colorectal.na <- colorectal[ ,sex.na, keep = TRUE ]
factor <- 2.5
minChanged <- 0.1
gainloss <- gainLoss(log2.ratios(colorectal.na), cols=1:ncol(colorectal.na), thres=factor*sd.samples(colorectal.na)$madGenome)
ind.clones.use <- which(gainloss$gainP >= minChanged | gainloss$lossP>= minChanged)
#create filtered dataset
colorectal.na <- colorectal.na[ind.clones.use,keep=TRUE]
dat <- log2.ratios.imputed(colorectal.na)
resT.sex <- mt.maxT(dat, sex[sex.na],test = "t.equalvar", B = 1000)
## Plot the result along the genome
plotFreqStat(colorectal.na, resT.sex, sex[sex.na],factor=factor,titles = c("Male", "Female"))
[Package
aCGH version 1.14.0
Index]