Rumford: Count Rumford's cooling data

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

Description

The Rumford data frame has 13 rows and 2 columns from an experiment by Count Rumford on the rate of cooling.

Format

This data frame contains the following columns:

time

a numeric vector giving the time since the beginning of the experiment (hr).

temp

a numeric vector giving the temperature (degrees Fahrenheit) of the cannon.

Source

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

Examples

plot(temp ~ time, Rumford, las = 1,
     xlab = "Time since beginning of experiment (hr)",
     ylab = "Temperature of cannon (degrees F)",
     main = "Rumford data and fitted curve")
fm1 <- nls(temp ~ 60 + 70 * exp(tc * time), data = Rumford,
           start = c(tc = -0.01))
summary(fm1)
usr <- par("usr")
xx <- seq(usr[1], usr[2], len = 50)
lines(xx, predict(fm1, list(time = xx)))

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