Tetra: Tetracycline concentrations

Description Format Source Examples

Description

The Tetra data frame has 9 rows and 2 columns from an experiment on the pharmacokinetics of tetracycline.

Format

This data frame contains the following columns:

time

a numeric vector of time since drug administration (hr).

conc

a numeric vector of tetracycline concentrations.

Source

Bates and Watts (1998), Nonlinear Regression Analysis and Its Applications, Wiley (Appendix A1.5).

Examples

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plot(conc ~ time, data = Tetra, las = 1,
     xlab = "Time since drug administration (hr)",
     ylab = "concentration",
     main = "Tetracycline data with fitted curve")
fm1 <- nls(conc ~ SSfol(1.0, time, lKe, lKa, lCl), Tetra)
summary(fm1)
usr <- par("usr")
xx <- seq(usr[1], usr[2], len = 101)
lines(xx, predict(fm1, list(time = xx)))

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