wishlist feature requests

On this page are listed some wish-lists for ggplot2.

New geoms

• using rasterGrob as an alternative to geom_tile for regular colormaps

• using a custom grob function that draws a shape with color, fill, size arguments (think Chernoff faces, or TeachingDemos::my.symbols())

• horizontal versions of all geoms which are not not x/y symmetric: geom_area, geom_bar, geom_boxplot, geom_crossbar, geom_density, geom_freqpoly, geom_histogram, geom_pointrange, geom_linerange, geom_quantile, geom_ribbon, and geom_smooth.

• geom_dotplot (Cleveland). The current hack with geom_point just doesn't cut it.

• using Delaunay or Voronoi tesselations to display 2D colormaps of irregular data (see latticeExtra::panel.levelplot.voronoi; packages deldir, Triangle)

General infrastructure

• should themes affect the default colour and fill scales? (e.g. a black and white theme could set the default scales to grey)

• a new kind of geom limited to the use with annotate(), for grobs that are not meant to be mapped to x, y, size, etc. (examples: image annotation, table annotation, etc.)

• specification of the panel sizes in absolute units, so as to allow alignment between different plots using grid

• Allowing a range to be specified on an axis, as kludged together here and here extended in a way described here. In other words, the range would get passed as a start and end coordinate, and a geom_ would be specified elsewhere to determine whether that axis range gets drawn as a brace, box, line, etc. An extension to the extension would be that if both x and y ranges were specified, to draw the braces on the axis and a box highlighting that area on the plot itself.

• Complete horizontal/vertical agnosticism. Anything that can be done on the x-axis can just as easily be done on the y-axis. This would eliminate the need for coord_flip() and the headaches it causes. Some details of what this entails are listed in stats and geoms.

Facets

• ability to specify independently the limits, tick marks, and labels of each panel

• ability to set only 1 limit for a scale, and allow the other to be determined by the training, possibly differently for each facet

New stats

• stack vertically multiple spectra or time series so as to avoid overlap between individual lines

• stats that can operate on the vertical dimension, not just the horizontal one (stat_bin, stat_boxplot, stat_density, stat_quantile, stat_smooth, stat_summary)

Visual aspect

• more options to change the x and y axis parameters independently (grid lines, tick length, etc.)

Themes

see also https://github.com/hadley/ggplot2/wiki/Themes

Integration with other graphic packages

• facilitate navigation to viewports and use of native units

• allow switching off clipping to move graphical elements outside the plotting region

New plot types

• Linked micromaps
• mailing list discussion
• National Cancer Institute Geographic Information Systems software
• Daniel Carr, Anthony Olsen, Jean-Yves Courbois, Suzanne Pierson, D. Andrew Carr, "Linked Micromap Plots: Named and Described", Statistical Computing & Statistical Graphics Newsletter 9 (1) 24-32.

New scales

• color scale where hue, luminance/lightness, and chroma/intensity can each be mapped separately as aesthetics

New positions

• position_dynamic

• deterministic position_jitter so that two geoms with the same set of starting points get jittered to the same locations (say a point and errorbar, or point and text)

• position_beeswarm, discussed on the mailing list

• dodging in the vertical direction: mailing list discussion