Boxplots encode the five number summary of a numeric variable, and are more efficient than trellis displays of histograms for comparing many numeric distributions. The
add_boxplot() function requires one numeric variable, and guarantees boxplots are oriented correctly, regardless of whether the numeric variable is placed on the x or y scale. As Figure 2.26 shows, on the axis orthogonal to the numeric axis, you can provide a discrete variable (for conditioning) or supply a single value (to name the axis category).
p <- plot_ly(diamonds, y = ~price, color = I("black"), alpha = 0.1, boxpoints = "suspectedoutliers") p1 <- p %>% add_boxplot(x = "Overall") p2 <- p %>% add_boxplot(x = ~cut) subplot( p1, p2, shareY = TRUE, widths = c(0.2, 0.8), margin = 0 ) %>% hide_legend()