R: Prostate Cancer Study of Singh et al. (2002)

singh2002 {sda} | R Documentation

## Prostate Cancer Study of Singh et al. (2002)

### Description

Gene expression data (6033 genes for 102 samples) from the microarray study of Singh et al. (2002).

### Usage

    data(singh2002)

### Format

`singh2002$x` is a 102 x 6033 matrix containing the expression levels. The rows contain the samples and the columns the genes.

`singh2002$y` is a factor containing the diagnosis for each sample ("cancer" or "healthy").

### Details

This data set contains measurements of the gene expression of 6033 genes for 102 observations: 52 prostate cancer patients and 50 healty men.

### Source

The data are described in Singh et al. (2001) and are provided in exactly the form as used by Efron (2008).

### References

D. Singh et al. 2002. Gene expression correlates of clinical prostate cancer behavior. Cancer Cell 1:203–209.

Efron, B. 2008. Empirical Bayes estimates for large-scale prediction problems. Technical Report, Standford University.

### Examples

    # load sda library
    library("sda")

    # load Singh et al (2001) data set
    data(singh2002)
    dim(singh2002$x) # 102 6033
    hist(singh2002$x)
    singh2002$y # 2 levels

[Package sda version 1.3.7 Index]