cmat: Contrast matrix describing the experimental questions

In daMA: Efficient design and analysis of factorial two-colour microarray data

Description

This matrix of numerical constants describes the experimental question, p say. Each experimental question is described by a single contrast vector (a single row in cmat) or by a contrast matrix (several rows in cmat). The ordering of the columns corresponds to that of the associated design matrix X. Thus, typically the first two elements in a row of cmat are reserved for for the two dyes. E.g. to compare the two dyes, we set (-1, 1, 0, ..., 0).

Usage

data(cmat)

References

Bretz, F and Landgrebe J and Brunner E (2003):"Design and analysis of two colour factorial microarray experiments", submitted.

Examples

data(cmat)
## maybe str(cmat) ; plot(cmat) ...

Example output

daMA documentation built on Nov. 8, 2020, 6:40 p.m.