bpd {SemiPar}	R Documentation


    Bronchopulmonary dysplasia data


      Description

The |bpd| data frame has data on 223 human babies.


      Usage

data(bpd)


      Format

This data frame contains the following columns:

birthweight
    birthweight of baby (grammes).
BPD
    an indicator of presence of bronchopulmonary dysplasia (BPD):
    0=absent, 1=present.


      Source

Pagano, M. and Gauvreau, K. (1993). /Principles of Biostatistics/.
Duxbury Press.


      References

Ruppert, D., Wand, M.P. and Carroll, R.J. (2003)
/Semiparametric Regression/ Cambridge University Press.
http://stat.tamu.edu/~carroll/semiregbook/


      Examples

library(SemiPar)
data(bpd)
attach(bpd)
plot(birthweight,BPD)
boxplot(split(birthweight,BPD),col="green")

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