Pre-standardization filter to select miRNA expressed in a specific proportion of samples

return a subset of the miRNA expression dataset containing miRNAs that are expressed in at least a specified percentage of samples based on a user-defined expression threshold

filter.exp(train_mir, cutoff = 75, threshold = 0)

Arguments

train_mir	an expression matrix with miRNA in columns, samples in rows
cutoff	percentage of samples in which the miRNA should be expressed
threshold	the numeric threshold defining expression of miRNA. Default threshold = 0.

Value

filtered miRNA expression matrix

Examples

New.mir <-  filter.exp(GA.mir, cutoff=95, threshold=0)