R Graphical Manual

Browse All

Last data update: 2014.03.03

R: Calculation of moving average for a matrix

ma.matrix

R Documentation

Calculation of moving average for a matrix

Description

Using a sliding square window this function produces the moving average for a matrix.

Usage

ma.matrix(X,av="median",delta= 2,edgeNA=FALSE )

Arguments

`X`	matrix
`av`	averaging by mean or median (default)
`delta`	integer determining the size of the sliding square window (2delta+1)x(2delta+1).
`edgeNA`	treatment of edges of array: For `edgeNA=TRUE`, averaged values of sliding windows are set to NA if the corresponding windows extend over the edges of the matrix.

Details

A square window with size (2*delta+1)x(2*delta+1) is moved over the entire matrix and a new matrix is created with each value equals the average value in the corresponding window. This procedure defines a local regression of zeroth order.

Value

Matrix with average values of matrix X.

Author(s)

Matthias E. Futschik (http://itb.biologie.hu-berlin.de/~futschik)

Examples


### LOADING DATA
data(sw)

### GENERATION OF MATRIX 
 Morig <- v2m(maM(sw)[,1],Ngc=maNgc(sw),Ngr=maNgr(sw),Nsc=maNsc(sw),Nsr=maNsr(sw),visu=TRUE)

### AVERAGING BY MA.MATRIX
 Mav <- ma.matrix(Morig,av="median",delta= 2,edgeNA=FALSE )

### VISUALISATION 
 m2v(Mav,Ngc=maNgc(sw),Ngr=maNgr(sw),Nsc=maNsc(sw),Nsr=maNsr(sw),visu=TRUE)

Results


R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(OLIN)
Loading required package: locfit
locfit 1.5-9.1 	 2013-03-22
Loading required package: marray
Loading required package: limma
> png(filename="/home/ddbj/snapshot/RGM3/R_BC/result/OLIN/ma.matrix.Rd_%03d_medium.png", width=480, height=480)
> ### Name: ma.matrix
> ### Title: Calculation of moving average for a matrix
> ### Aliases: ma.matrix
> ### Keywords: utilities regression
> 
> ### ** Examples
> 
> 
> ### LOADING DATA
> data(sw)
> 
> ### GENERATION OF MATRIX 
>  Morig <- v2m(maM(sw)[,1],Ngc=maNgc(sw),Ngr=maNgr(sw),Nsc=maNsc(sw),Nsr=maNsr(sw),visu=TRUE)
> 
> ### AVERAGING BY MA.MATRIX
>  Mav <- ma.matrix(Morig,av="median",delta= 2,edgeNA=FALSE )
> 
> ### VISUALISATION 
>  m2v(Mav,Ngc=maNgc(sw),Ngr=maNgr(sw),Nsc=maNsc(sw),Nsr=maNsr(sw),visu=TRUE)
> 
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>