mplot | R Documentation |
Graphs means for two-way factor combinations (interaction plots). Any number of factors may be included and all possible two factor combinations will be plotted.
mplot(y, ..., both = FALSE)
y |
Vector of responses whose means are graphed. |
... |
Vectors of independent variables on which the responses' means are broken down. |
both |
If TRUE, creates additional plots with the opposite factor on the x-axis. |
interaction.plot, means, mean
# Create a data set with three factors (age, gender and number of water breaks) race<-data.frame(c(1.02,.99,1.11,1.30,1.09,1.26,1.21,1.19,1.30,1.45,1.34,1.49), c('M','M','M','M','M','M','F','F','F','F','F','F'), c('under 50','under 50','under 50','over 50','over 50','over 50', 'under 50','under 50','under 50','over 50','over 50','over 50'), c(1,0,2,2,0,1,2,1,0,2,1,0)) names(race)<-c("time","gender","age","water") # Show mean times broken by age, gender and age & gender mplot(race$time, race$age, race$gender) # Show 2 plots, with age and then gender along the x-axis mplot(race$time, race$age, race$gender, both=TRUE) # Now also consider water breaks mplot(race$time, race$age, race$gender, race$water, both=TRUE) # Print the means for the above plots means(race$time, race$age, race$gender, race$water)
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