kidney {edge} | R Documentation

## Gene expression dataset from Rodwell et al. (2004)

### Description

Gene expression measurements from kidney samples were obtained from 72 human subjects ranging in age from 27 to 92 years. Only one array was obtained per individual, and the age and sex of each individual were recorded.

### Usage

    data(kidney)

### Format

- kidcov: A 133 rows by 6 columns data frame detailing the study design.

- kidexpr: A 500 rows by 133 columns matrix of gene expression values, where each row corresponds to a different probe-set and each column to a different tissue sample.

- age: A vector of length 133 giving the age of each sample.

- sex: A vector of length 133 giving the sex of each sample.

### Value

kidney dataset

### Note

These data are a random subset of 500 probe-sets from the total number of probe-sets in the original data set. To download the full data set, go to http://genomine.org/edge/. The `age` and `sex` are contained in `kidcov` data frame.

### References

Storey JD, Xiao W, Leek JT, Tompkins RG, and Davis RW. (2005) Significance analysis of time course microarray experiments. PNAS, 102: 12837-12842.
http://www.pnas.org/content/100/16/9440.full

### Examples

    # import data
    data(kidney)
    sex <- kidney$sex
    age <- kidney$age
    kidexpr <- kidney$kidexpr

    # create model
    de_obj <- build_study(data = kidexpr, adj.var = sex, tme = age,
    sampling = "timecourse", basis.df = 4)

    # use the ODP/lrt method to determine significant genes
    de_odp <- odp(de_obj, bs.its=10)
    de_lrt <- lrt(de_obj, nullDistn = "bootstrap", bs.its = 10)

    # summarize significance results
    summary(de_odp)

[Package edge version 2.19.0 Index]