[R-pkgs] ggplot2 - version 0.5.6

[hadley wickham]

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.

Find out more at http://had.co.nz/ggplot2, and check out the over 500
examples of ggplot in use.

Changes in version 0.5.6
----------------------------------------

Improved error messages and other notifications:
  * all geoms and position adjustments should now give an informative
error message when required aesthetics are missing
  * better error messages if data not a data frame, or mapping not
created by aes or aes_string
  * better errors for qplot when variables missing or data invalid
  * better error if somehow you are missing necessary scales
  * stat_bin informs you of the default choice of binwidth
  * stat_smooth gives helpful error messages for common problems
  * printing a geom now displays the data set that it uses (if not the default)

Other improvements:
  * colour and fill legends now surround by background plot colour
  * can now draw arrow heads with geom_segment, and have added an
example demonstrating drawing a vector field
  * density plots should always include 0 on y axis
  * default boxplot outlier changed colour to black
  * stat_smooth supports categorical variables a little better
  * implemented hash methods for all ggplot objects.  This is the
first step in making it easier for me to compare all examples between
versions for quality control purposes

New data:
  * seals, contributed by David Brillinger and Charlotte Wickham, used
for vector field example

Bug fixes:
  * geoms hline, vline and abline now all work correctly when a
grouping variable is used
  * block histograms (where individuals are identifiable) now work correctly
  * all ggplot objects should now print properly from the command line
  * fixed bug in geom_path when only 1 point
  * segments geom now works correctly for more coordinate systems
  * order variables in scatterplot matrix by order of variables in data.frame
  * geom_density deals with missing values correctly when displaying
scaled densities
  * fixed bug in calculating categorical ranges
  * fixed bug in drawing error bars

Subtractions
  * now relies on R 2.6
  * removed grid.gedit and grid.gremove, and code replaced by grid.ls


-- 
http://had.co.nz/