leuk package:AA R Documentation
Survival Times and White Blood Cell Counts
Description:
The 'leuk' data frame has 17 rows and 2 columns.
Survival times in weeks of 17 patients with leukaemia, along with
their base 10 logarithm of the white blood cell counts at the time
of diagnosis.
Usage:
data(leuk)
Format:
This data frame contains the following columns:
'x' the logarithm (base 10) of the white blood cell counts for
each patient;
't' the survival time in weeks of leukaemia patients.
Source:
The data were obtained from
Feigl, P. and Zelen, M. (1965). Estimation of exponential
survival probabilities with concomitant information.
_Biometrics_, *21*, 826-838.
References:
Brazzale, A.R., Davison, A.C. and Reid, N. (2007). _Applied
Asymptotics: Case Studies in Small-Sample Statistics_. Cambridge
University Press, Cambridge. Example 5.5.
Cox, D.R. and Snell, E.J. (1981). _Applied Statistics: Principles
and Examples_. Chapman & Hall, London. Example U.
Examples:
data(leuk)
plot(t ~ x, data = leuk, xlab = "white blood cell counts",
ylab = "survival time")