[BioC] reg Golub Data set

[Rafael A. Irizarry]

in R  you can use characters as indexes. for vectors and lists you can use
the names function to assign these. for matrices you an use colnames and
rownames. and for arrays you canuse dimnames. for example:

x <- c(TRUE,FALSE,TRUE)
names(x) <- c("a","b","c")
show(x)

On Tue, 2 Sep 2003, Dibakar Ray wrote:

> 
> Recently I have started working with R and bioconductor package.
> I was going through the documentation and tutorial availbale at
> bioconductor site. In one of the tutorial the following commands are shown
> -
> LS<-exprs(golubTrain)
> cl<-golubTrain$ALL.AML
> TS<-exprs(golubTest)
> clts<-golubTest$ALL.AML
> ##mmfilt is in the library
> LS[LS<100]<-100
> TS[TS<100]<-100
> LS[LS>16000]<-16000
> TS[TS>16000]<-16000
> mmfilt <- function(r=5, d=500, na.rm=TRUE) {
> function(x) {
> minval <- min(x, na.rm=na.rm)
> maxval <- max(x, na.rm=na.rm)
> (maxval/minval > 5) && (maxval-minval > 500)
> }
> }
> mmfun <- mmfilt()
> ffun <- filterfun(mmfun)
> good <- genefilter(cbind(LS, TS), ffun )
> sum(good) ##I get 3571
> LSsub <- log10(LS[good,])
> TSsub <- log10(TS[good,])
> LTsub <- cbind(LSsub, TSsub)
> =============
> My question is realted to the object good. If I use typeof(good), it shows
> logical. So what I understand is good is a logical vector.
> 
> But when I type good at the R prompt, it gives me a list of gene name
> along  with TRUE FALSE value.
> My understanding of logical vector is that it contains elements which are
> TRUE or FALSE. So my question is how gene names are accomodated into good.
> Thanks
> Dibakar Ray
> 
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