| expFilter {EMA} | R Documentation |
This function takes an expression matrix and filtered out non detected genes.
expFilter(data, threshold = 3.5, p=0.01, graph = TRUE)
data |
expression matrix, genes on rows and samples on columns. |
threshold |
minimal value of expression to be reached |
p |
keep probes with at least p*ncol(data) samples higher than threshold |
graph |
boolean indicating if an histogram of the data should be plotted. |
... |
Arguments to be passed to methods, such as graphical parameters (see 'par'). |
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.
The graph represents the distribution of all the genes in
Data. A line shows the threshold value used.
An expression matrix.
EMA group
data(marty) expFilter(marty, threshold = 3.5, graph = TRUE)