GraphAT (version 1.44.0)

causton: Yeast mRNA Expression Data

Description

This data set contains mRNA expression from a microarray experiment involving yeast grown under a variety of altered environments (e.g. acid, heat, sorbitol, etc.)

Usage

data(causton)

Format

A matrix whose rows are the 6015 genes and whose columns are the 45 experimental conditions.

Source

http://web.wi.mit.edu/young/environment

References

Causton, H. C. et al. 2001 ``Remodeling of Yeast Genome Expression in Response to Environmental Changes.'' Molecular Biology of the Cell 12, 323--337.

Examples

data(causton)

## Find the 3000 most variable genes, according to sd/mean:

varMeas<-function(vec) sd(vec)/mean(vec)
variability<-apply(causton,1,varMeas)

rks<-rank(variability)

causton3000<-causton[rks>length(rownames(causton))-3000,]