-ggplot(d) +
- aes(x=as.factor(num.calls)) +
- geom_bar() +
- stat_count() +
- scale_x_discrete("Number of questions answered") +
- scale_y_continuous("Number of students") +
- theme_bw() +
- facet_wrap(.~absences, ncol=5, labeller="absence.labeller")
+## ggplot(d) +
+## aes(x=as.factor(num.calls)) +
+## geom_bar() +
+## stat_count() +
+## scale_x_discrete("Number of questions answered") +
+## scale_y_continuous("Number of students") +
+## theme_bw() +
+## facet_wrap(.~absences, ncol=5, labeller="absence.labeller")