A filter function for Analysis of Variance

Description

Anova returns a function of one argument with bindings for cov and p. The function, when evaluated, performs an ANOVA using cov as the covariate. It returns TRUE if the p value for a difference in means is less than p.

Usage

Anova(cov, p=0.05, na.rm=TRUE)

Arguments

Details

The function returned by Anova uses lm to fit a linear model of the form lm(x ~ cov), where x is the set of gene expressions. The F statistic for an overall effect is computed and if it has a p-value less than p the function returns TRUE, otherwise it returns FALSE for that gene.

Value

Anova returns a function with bindings for cov and p that will perform a one-way ANOVA.

The covariate can be continuous, in which case the test is for a linear effect for the covariate.

Author(s)

R. Gentleman

See Also

kOverA, lm

Examples

  set.seed(123)
  af <- Anova(c(rep(1,5),rep(2,5)), .01)
  af(rnorm(10))

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(genefilter)
> png(filename="/home/ddbj/snapshot/RGM3/R_BC/result/genefilter/Anova.Rd_%03d_medium.png", width=480, height=480)
> ### Name: Anova
> ### Title: A filter function for Analysis of Variance
> ### Aliases: Anova
> ### Keywords: manip
> 
> ### ** Examples
> 
>   set.seed(123)
>   af <- Anova(c(rep(1,5),rep(2,5)), .01)
>   af(rnorm(10))
[1] FALSE
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>