Filter data before feeding som algorithm for gene expression data
Filtering data by certain floor, ceiling, max/min ratio, and max - min difference.
filtering(x, lt=20, ut=16000, mmr=3, mmd=200)
x |
a data frame or matrix of input data. |
lt |
floor value replaces those less than it with the value |
ut |
ceiling value replaced those greater than it with the value |
mmr |
the max/min ratio, rows with max/min < mmr will be removed |
mmd |
the max - min difference, rows with (max - min) < mmd will be removed |
An dataframe or matrix after the filtering
Jun Yan <jyan@stat.uiowa.edu>
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