residPlot {s20x} | R Documentation |
Plots a scatter plot for the variables of the residuals and fitted values from the linear model, lmfit. A lowess smooth line for the underlying trend, as well as one standard deviation error bounds for the scatter about this trend, are added to this scatter plot. A test for a quadratic relationship between the residuals and the fitted values is also computed.
residPlot(lmfit,f=0.5)
lmfit |
an lm object, i.e. the output from "lm()". |
f |
the smoother span. This gives the proportion of points in the plot which influence the smooth at each value. Larger values give more smoothness. |
Returns the plot.
"trendscatter"
# Peruvian Indians data data(peru.df) fit<-lm(BP~age+years+weight+height, data = peru.df) residPlot(fit)