ggplot2 ------------------------------------------------------------
ggplot2 is a plotting system for R, based on the grammar of graphics,
which tries to take the good parts of base and lattice graphics and
avoid bad parts. It takes care of many of the fiddly details
that make plotting a hassle (like drawing legends) as well as
providing a powerful model of graphics that makes it easy to produce
complex multi-layered graphics.
To install or update, run:
install.packages(c("ggplot2", "plyr"))
Find out more at http://had.co.nz/ggplot2, and check out the nearly 500
examples of ggplot in use. If you're interested, you can also sign up to
the ggplot2 mailing list at http://groups.google.com/group/ggplot2, or track
development at http://github.com/hadley/ggplot2
See NEWS for changes in latest version
ggplot2 0.8.5 (2009-12-15) ----------------------------------------
New features
* geom_text gains parse argument which makes it possible to display
expressions. (Implements #50)
* all scales now have legend parameter, which defaults to TRUE. Setting to
false will prevent that scale from contributing to the legend (Implements
#27)
* default axis labels and legend titles are now stored in the options, instead
of in each scale. This fixes a long standing bug where it was not easy to
set the label for computed variable, such as the y axis on a histogram.
Additionally, it means default scales are only added to the plot until just
prior to plotting, instead of the previous behaviour where scales where
added as layers were added - this could cause problems if you later modified
the underlying data. (Implements #28)
* coord_equal: when ratio = NULL (the default), it will adjust the aspect
ratio of the plot, rather than trying to extend the shortest axis.
* x and y positions can be set to Inf or -Inf to refer to the top/right and
bottom/left extents of the panel. (Implements #18)
* expand_limits(): a new function to make it easy to force the inclusion of
any set of values in the limits of any aesthetic.
New features (minor)
* aesthetics: when _setting_ an aesthetic, you may only set it to a single
value. This was always a good idea, but now it is enforced with an
informative error message.
* stat_contour bump up default number of contours
* stat_density2d: make number of grid points used for density estimation
user controllable (implements #9)
* geom_bin now allows you to set whether bins used intervals of the form
(a, b] or [a, b) with the "right" parameter (implements #20)
* geom_path: linejoin, lineend and linemitre are now user controllable
(implements #24)
* scales: all scales check that breaks are supplied if labels are, and
that breaks and labels are the same length (implements #40)
* scales: if breaks are a named vector, the names will be used as labels
(thanks to suggestion by David Kahle)
* scale_colour_gradient, scale_colour_gradient2 & scale_colour_gradientn now
have formatter argument to match scale_continuous
* updated citation to refer to the ggplot2 book
Bug fixes
* coord_cartesian now correctly sets limits when one or both of the position
scales are non-linear. (fixes #17)
* coord_equal: now works with non-linear scales (fixes #13)
* coord_map sets aspect ratio correctly (fixes #4)
* coord_polar correctly combines labels on end of axis if expressions
(fixes #39)
* coord_trans now respects scale expand parameter (expansion occurs after
transformation) (fixes #14)
* facet_grid with scales = "free" and space = "free" now
calculates space
correctly if the range of the scale is < 1 (fixes #1)
* facet_grid works once more when facetting with multiple variables in one
direction (fixes #11)
* facet_wrap now sets aspect ratio correctly
* facet_wrap now maintains original order of data
* geom_hline and geom_vline now work with coord_flip (fixes #30)
* geom_path drops missing values at start and end of each line (fixes #41)
* scale_shape_discrete, scale_size_continuous, scale_alpha and
scale_linetype_discrete added to scales to match naming convention of all
other scales (fixes #47)
* legends now correctly calculate label widths (fixes #38)
* legends will only merge if both the title and all labels are the same.
(fixes #16)
* legends: fix for bug #19: Legend with three constraints doesn't work
* stat_contour & stat_density2d: fix grouping bugs (issue #7)
* xlim, ylim: fix bug when setting limits of discrete scales
--
http://had.co.nz/
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