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我想R中创建以下ExpressionSet:[R ExpressionSet过滤NA值
dataDirectory <- system.file("extdata", package = "Biobase")
exprsFile <- "path to expression data.txt"
exprs <- as.matrix(read.table(exprsFile, header = TRUE, sep = "\t", row.names = 1, as.is = TRUE))
pDataFile <- "path to phenotype data.txt"
pData <- read.table(pDataFile, row.names=1, header=TRUE, sep="\t")
phenoData <- new("AnnotatedDataFrame",data=pData)
现在删除从exprs那些列与NA的超过80%的值
exprs <- exprs[,colSums(is.na(exprs)) < 0.8]
之前,我可以执行以下代码&构建ExpressionSet我必须删除与exprs中上面删除的列匹配的phenoData(= samples)中的所有行。我怎样才能做到这一点?
exampleSet <- ExpressionSet(assayData=exprs, phenoData=phenoData)
exampleSet
谢谢你的解决方案! – user86533