Lipo: Lipoprotein concentrations

In NRAIA: Data sets from "Nonlinear Regression Analysis and Its Applications"

Description

The Lipo data frame has 12 rows and 2 columns of lipoprotein concentrations over time.

Format

This data frame contains the following columns:

time

a numeric vector giving the time of the concentration measurement (hr)

conc

a numeric vector of concentrations.

Source

Bates and Watts (1998), Nonlinear Regression Analysis and Its Applications, Wiley (Appendix A4.1).

Examples

plot(conc ~ time, data = Lipo,
     xlab = "Time since drug administration (hr)",
     ylab = "Lipoprotein concentration",
     main = "Lipo data and fitted curve", las = 1)
fm1 <- nls(conc ~ SSbiexp(time, A1, lrc1, A2, lrc2), data = Lipo)
summary(fm1)
usr <- par("usr")
xx <- seq(usr[1], usr[2], len = 51)
lines(xx, predict(fm1, list(time = xx)))
title(sub = deparse(fm1$call$formula))

NRAIA documentation built on May 2, 2019, 4:52 p.m.