Nothing
load.gsea <- function(pathwayFile="c2.cp.kegg.v3.0.symbols.gmt",cohort = "Boston", path, npars=2, ncats=3) {
lines <- readLines(pathwayFile)
n <- length(lines)
if(is.character(path)) {
for(ll in lines) {
ls <- strsplit(ll,"\t")[[1]]
if(ls[1] == path)
break
}
if(length(ls) < 1 || ls[1] != path)
stop("no valid pathway")
}
else if(is.numeric(path)) {
path <- as.integer(path)
if(path < 1 || path > n)
stop("n out of range")
ls <- strsplit(lines[[path]],"\t")[[1]]
cat(ls[1],"\n")
}
if(length(ls) < 3)
stop("no valid pathway")
pathname <- ls[1]
path <- ls[3:length(ls)]
if(cohort == "Boston") {
data <- read.table("Lung_Boston_collapsed_symbols.gct", header=TRUE, sep='\t', skip=2)
cls <- c(rep(1, 31), rep(2,31))
}
else if(cohort == "Michigan") {
data <- read.table("Lung_Michigan_collapsed_symbols.gct", header=TRUE, sep='\t', skip=2)
cls <- c(rep(1, 24), rep(2, 62))
}
else {
stop("no valid cohort")
}
pathid <- NULL
levs <- levels(data[,1])
for(i in 1:length(path)) {
id <- which(data[,1] == path[i])
if(length(id) != 1)
next
str <- levs[data[id[1], 1]]
if(nchar(str) > 16 || length(which(pathid==id[1]))>0)
next
pathid <- c(pathid, id[1])
}
path <- as.character(data[pathid,1])
path <- as.character(sapply(path, function(ss) sub("-",".",ss)))
path <- as.character(sapply(path, function(ss) sub("-",".",ss)))
path <- as.character(sapply(path, function(ss) sub("@",".",ss)))
path <- as.character(sapply(path, function(ss) sub("@",".",ss)))
path <- as.character(sapply(path, function(ss) sub(" /// ",".",ss)))
path <- as.character(sapply(path, function(ss) sub(" /// ",".",ss)))
path <- as.character(sapply(path, function(ss) sub("_",".",ss)))
path <- as.character(sapply(path, function(ss) sub("_",".",ss)))
cdata <- data[pathid, 3:ncol(data)]
rownames(cdata) <- path
numnodes <- nrow(cdata)
numsamples <- ncol(cdata)
cdata <- as.matrix(cdata, nrow=numnodes)
cat(numnodes, " nodes and ", numsamples, " samples\n")
nodePars <- rep(npars, numnodes)
nodeOrder <- 1:numnodes
nodeCats <- lapply(1:nrow(cdata), function(i) return(1:ncats))
names(nodeCats) <- path
return(list(pathname=pathname, cdata=cdata, cls=cls, pathway=path, nodeOrder=nodeOrder, nodePars=nodePars, nodeCats=nodeCats))
}
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