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title: bar author: Daniel Jones part: Geometry order: 1003 ...

Draw bar plots. This geometry works on pre-summarized data such as counts. To draw histograms from a series of observations, add Stat.histogram to the plot, or use the conevient geometry Geom.histogram.

Aesthetics

  • y: Height of each bar.
  • color (optional): Group categorically by color.

Either

  • x: Position of each bar.

Or

  • xmin: Starting x positions for each bar.
  • xmax: End x positions for each bar.

If x is given, a bar will be drawn at each x value, specifying both xmin and xmax allows bars of variable width to be drawn.

Arguments

  • position: Either :stack or :dodge. If the color aesthetic is bound this determines how bars of different colors should be arranged: stacked on top of each other, or placed side by side.

  • orientation: Either :vertical (default) or :horizontal. If :horizontal, then the required aesthetics are y or ymin/ymax.

Examples

using RDatasets
using Gadfly

Gadfly.prepare_display()
Gadfly.set_default_plot_size(12cm, 8cm)

plot(data("HistData", "ChestSizes"), x="Chest", y="Count", Geom.bar)