Simple Check for Constant Time Series

Description

is.constant is a utility function that checks whether a time series is constant.

Usage

is.constant(x)

Arguments

Value

A vector with a boolean statement (TRUE or FALSE) for each time series.

Author(s)

Korbinian Strimmer (http://strimmerlab.org).

Examples

# load GeneCycle library
library("GeneCycle")

# load data set
data(caulobacter)

# any constant genes?
sum(is.constant(caulobacter))

# but here:
series.1 <- rep(1, 10)
series.2 <- seq(1, 10)
is.constant( cbind(series.1, series.2) )

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(GeneCycle)
Loading required package: MASS
Loading required package: longitudinal
Loading required package: corpcor
Loading required package: fdrtool
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/GeneCycle/is.constant.Rd_%03d_medium.png", width=480, height=480)
> ### Name: is.constant
> ### Title: Simple Check for Constant Time Series
> ### Aliases: is.constant
> ### Keywords: ts
> 
> ### ** Examples
> 
> # load GeneCycle library
> library("GeneCycle")
> 
> # load data set
> data(caulobacter)
> 
> # any constant genes?
> sum(is.constant(caulobacter))
[1] 0
> 
> # but here:
> series.1 <- rep(1, 10)
> series.2 <- seq(1, 10)
> is.constant( cbind(series.1, series.2) )
series.1 series.2 
    TRUE    FALSE 
> 
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>