geom_crossbar: Vertical intervals: lines, crossbars & errorbars.

#' # Create a simple example dataset df <- data.frame(  trt = factor(c(1, 1, 2, 2)),  resp = c(1, 5, 3, 4),  group = factor(c(1, 2, 1, 2)),  upper = c(1.1, 5.3, 3.3, 4.2),  lower = c(0.8, 4.6, 2.4, 3.6) )  p <- ggplot(df, aes(trt, resp, colour = group)) p + geom_linerange(aes(ymin = lower, ymax = upper)) p + geom_pointrange(aes(ymin = lower, ymax = upper)) p + geom_crossbar(aes(ymin = lower, ymax = upper), width = 0.2) p + geom_errorbar(aes(ymin = lower, ymax = upper), width = 0.2)  # Draw lines connecting group means p +  geom_line(aes(group = group)) +  geom_errorbar(aes(ymin = lower, ymax = upper), width = 0.2)  # If you want to dodge bars and errorbars, you need to manually # specify the dodge width p <- ggplot(df, aes(trt, resp, fill = group)) p +  geom_bar(position = "dodge", stat = "identity") +  geom_errorbar(aes(ymin = lower, ymax = upper), position = "dodge", width = 0.25)  # Because the bars and errorbars have different widths # we need to specify how wide the objects we are dodging are dodge <- position_dodge(width=0.9) p +  geom_bar(position = dodge, stat = "identity") +  geom_errorbar(aes(ymin = lower, ymax = upper), position = dodge, width = 0.25)