elastic2 {DAAG} | R Documentation |
The elastic2
data frame has 9 rows and 2 columns
giving, for each amount by which an elastic band is stretched
over the end of a ruler, the distance that the band traveled when
released.
elastic2
This data frame contains the following columns:
J. H. Maindonald
plot(elastic2) pause() print("Chapter 5 Exercise") yrange <- range(c(elastic1$distance, elastic2$distance)) xrange <- range(c(elastic1$stretch, elastic2$stretch)) plot(distance ~ stretch, data = elastic1, pch = 16, ylim = yrange, xlim = xrange) points(distance ~ stretch, data = elastic2, pch = 15, col = 2) legend(xrange[1], yrange[2], legend = c("Data set 1", "Data set 2"), pch = c(16, 15), col = c(1, 2)) elastic1.lm <- lm(distance ~ stretch, data = elastic1) elastic2.lm <- lm(distance ~ stretch, data = elastic2) abline(elastic1.lm) abline(elastic2.lm, col = 2) summary(elastic1.lm) summary(elastic2.lm) pause() predict(elastic1.lm, se.fit=TRUE) predict(elastic2.lm, se.fit=TRUE)