Description Format Source Examples
The Rumford
data frame has 13 rows and 2 columns from an
experiment by Count Rumford on the rate of cooling.
This data frame contains the following columns:
a numeric vector giving the time since the beginning of the experiment (hr).
a numeric vector giving the temperature (degrees Fahrenheit) of the cannon.
Bates and Watts (1998), Nonlinear Regression Analysis and Its Applications, Wiley (Appendix A1.5).
1 2 3 4 5 6 7 8 9 10  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)))

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