filtering {som}R Documentation

Filter data before feeding som algorithm for gene expression data

Description

Filtering data by certain floor, ceiling, max/min ratio, and max - min difference.

Usage

filtering(x, lt=20, ut=16000, mmr=3, mmd=200)

Arguments

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

Value

An dataframe or matrix after the filtering

Author(s)

Jun Yan <jyan@stat.uiowa.edu>

See Also

normalize.


[Package som version 0.3-4 Index]