On this R-data statistics page, you will find information about the rats data set which pertains to data from Exercise 7.13, p225. The rats data set is found in the KMsurv R package. You can load the rats data set in R by issuing the following command at the console data("rats"). This will load the data into a variable called rats. If R says the rats data set is not found, you can try installing the package by issuing this command install.packages("KMsurv") and then attempt to reload the data. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the rats R data set. The size of this file is about 4,355 bytes.

data from Exercise 7.13, p225

Description

The rats data frame has 50 rows and 4 columns.

Format

This data frame contains the following columns:

time

Time to tumor development

tumor

Indicator of tumor development (1=yes, 0=no)

trt

Treatment (1=treated with drug, 0=given placebo)

litter

Litter

Source

Klein and Moeschberger (1997) Survival Analysis Techniques for Censored and truncated data, Springer.

Examples

data(rats)

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Dataset imported from https://www.r-project.org.