R: Filter data before feeding som algorithm for gene expression...

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 0.3-5.1 Index]