# Exploring Data with Simple Plots ## Boxplots Create a boxplot comparing the variable "volume" (i.e., lung capacity volume) by "smoker" using the "formula" input (useful if you have a single numerical variable that you want to compare across groups). what is happening in this boxplot? Do you see anything wrong with r,fig.width-4,fig.height-4) boxplot(formula- smokingSvolume-smoking$smoker,col c("blue", "orange")) = Error in boxplot. default(formula = smoking$volume - smoking$smoker, col = t show Traceback c("blue", : argument "x" is missing, with no default Calculate z-scores for the variables "height" and "volume", and create a boxplot comparing these z-scores using the input "x" from the boxplot function Cuseful if you want to compare different variables r,fig.width-4,fig.height-4) z.height