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title: errorbar author: Daniel Jones part: Geometry order: 1002 ...

Draw an vertical and/or horizontal error bars.

Asthetics

  • x: X-position of the bar.
  • ymin: Lower Y-position.
  • ymax: Upper Y-position.
  • y: Y-position of the bar.
  • xmin: Lef-tmost X-position
  • ymax: Right-most X-position.
  • color (optional): Bar color (categorial or continuous)

The x, ymin, ymax and/or y, xmin, xmax aesthetics must be defined. With the later a vertical error bar is drawn, and the former, a horizontal bar.

Examples

using RDatasets
using Gadfly

Gadfly.prepare_display()
Gadfly.set_default_plot_size(14cm, 8cm)
srand(1234)

using Distributions

sds = [1, 1/2, 1/4, 1/8, 1/16, 1/32]
n = 10
ys = [mean(rand(Normal(0, sd), n)) for sd in sds]
ymins = ys .- (1.96 * sds / sqrt(n))
ymaxs = ys .+ (1.96 * sds / sqrt(n))

plot(x=1:length(sds), y=ys, ymin=ymins, ymax=ymaxs,
     Geom.point, Geom.errorbar)