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This function takes an expression matrix and filtered out non detected genes.
expFilter(data, threshold = 3.5, p=0.01, graph = TRUE)
expression matrix, genes on rows and samples on columns.
minimal value of expression to be reached
keep probes with at least p*ncol(data) samples higher than threshold
boolean indicating if an histogram of the data should be plotted.
An expression matrix.
The non variant genes are defined gy the threshold value. A gene is kept if at least p*ncol(data) of its values is higher than threshold.
threshold
The graph represents the distribution of all the genes in Data. A line shows the threshold value used.
Data
# NOT RUN { data(marty) expFilter(marty, threshold = 3.5, graph = TRUE) # }
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