polish news (#3209)

Author: thomasp85

NEWS.md

@@ -1,80 +1,115 @@
 # ggplot2 3.1.0.9000
 
-* `geom_rug()` gains a `length` option to allow for changing the length of the rug lines. (@daniel-wells, #3109)
+This is a minor release with an emphasis on internal changes to make ggplot2 
+faster and more consistent. The few interface changes will only affect the 
+aesthetics of the plot in minor ways, and will only potentially break code of
+extension developers if they have relied on internals that have been changed. 
+This release also sees the addition of Hiroaki Yutani (@yutannihilation) to the 
+core developer team.
 
-* `coord_sf()` graticule lines are now drawn in the same thickness as 
-  panel grid lines in `coord_cartesian()`, and seting panel grid
-  lines to `element_blank()` now also works in `coord_sf()` 
-  (@clauswilke, #2991, #2525).
-
-* ggplot2 no longer attaches any external packages when using functions that depend on
-  packages that are suggested but not imported by ggplot2. The affected functions
-  include `geom_hex()`, `stat_binhex()`, `stat_summary_hex()`, `geom_quantile()`,
-  `stat_quantile()`, and `map_data()` (@clauswilke, #3126).
+## New features
 
-* `geom_hline()`, `geom_vline()`, and `geom_abline()` now throw a warning if the user supplies both an `xintercept`, `yintercept`, or `slope` value and a mapping (@RichardJActon, #2950).
+* This release includes a range of internal changes that speeds up plot 
+  generation. None of the changes are user facing and will not break any code,
+  but in general ggplot2 should feel much faster. The changes includes, but are
+  not limited to:
+  
+  - Caching ascent and descent dimensions of text to avoid recalculating it for
+    every title.
 
-* `scale_color_continuous()` now points at `scale_colour_continuos()` so that it 
-  will handle `type = "viridis"` as the documentation states (@hlendway, #3079).
+  - Using a faster data.frame constructor as well as faster indexing into 
+    data.frames
+    
+  - emoving the plyr dependency, replacing plyr functions with faster 
+    equivalents.
 
-* `scale_shape_identity()` now works correctly with `guide = "legend"` (@malcolmbarrett, #3029)
+* `geom_polygon()` can now draw polygons with holes using the new `subgroup` 
+  aesthetic. This functionality requires R 3.6.0 (@thomasp85, #3128)
 
-* Facet strips on the left side of plots now have clipping turned on, preventing
-  text from running out of the strip and borders from looking thicker than for
-  other strips (@karawoo, #2772 and #3061).
+* Aesthetic mappings now accept functions that return `NULL` (@yutannihilation,
+  #2997).
 
-* `coord_map()` now can have axes on the top and right (@karawoo, #3042).
+* `stat_function()` now accepts rlang/purrr style anonymous functions for the 
+  `fun` parameter (@dkahle, #3159).
 
-* `geom_rug()` gains an "outside" option to allow for moving the rug tassels to outside the plot area. (@njtierney, #3085)
+* `geom_rug()` gains an "outside" option to allow for moving the rug tassels to 
+  outside the plot area (@njtierney, #3085) and a `length` option to allow for 
+  changing the length of the rug lines (@daniel-wells, #3109). 
 
-* `geom_rug()` now works with `coord_flip()` (@has2k1, #2987).
+## Extensions
 
 * Layers now have a new member function `setup_layer()` which is called at the
-  very beginning of the plot building process and which has access to the original
-  input data and the plot object being built. This function allows the creation of
-  custom layers that autogenerate aesthetic mappings based on the input data or that
-  filter the input data in some form. One example is the new `LayerSf` class which
-  locates the geometry column in sf objects and sets up an aesthetic mapping for it
-  (@clauswilke, #2872).
-
-* Default labels are now generated more consistently; e.g., symbols no longer
-  get backticks, and long expressions are abbreviated with `...`
-  (@yutannihilation, #2981).
-  
-* Diverging brewer color scale now has the correct mid-point color (@dariyasydykova, #3072).
+  very beginning of the plot building process and which has access to the 
+  original input data and the plot object being built. This function allows the 
+  creation of custom layers that autogenerate aesthetic mappings based on the 
+  input data or that filter the input data in some form. This is mainly of 
+  interest to extension developers (@clauswilke, #2872).
 
-* Aesthetic mappings now accept functions that return `NULL` (@yutannihilation,
-  #2997).
-
-* Closed arrows in `element_line()` are now filled (@yutannihilation, #2924).
+* `x0` and `y0` are now recognized positional aesthetics so they will get scaled 
+  if used in extension geoms and stats (@thomasp85, #3168)
 
-* ggplot2 now works in Turkish locale (@yutannihilation, #3011).
+## Minor improvements and bug fixes
 
-* `GeomRibbon` and `GeomArea` now sort the data along the x-axis in the 
-  `setup_data()` method rather than as part of `draw_group()` (@thomasp85, #3023)
+* `coord_map()` now can have axes on the top and right (@karawoo, #3042).
 
 * `coord_sf()`, `coord_map()`, and `coord_polar()` now squash `-Inf` and `Inf`
   into the min and max of the plot (@yutannihilation, #2972).
 
-* `stat_bin()` will now error when the number of bins exceeds 1e6 to avoid 
-  accidentally freezing the user session (@thomasp85).
+* `coord_sf()` graticule lines are now drawn in the same thickness as panel grid 
+  lines in `coord_cartesian()`, and seting panel grid lines to `element_blank()` 
+  now also works in `coord_sf()` 
+  (@clauswilke, #2991, #2525).
 
-* `stat_bin()` now handles data with only one unique value (@yutannihilation #3047).
+* `economics` data has been regenerated. This leads to some changes in the
+  values of all columns (especially in `psavert`), but more importantly, strips 
+  the grouping attributes from `economics_long`.
 
-* `stat_function()` now accepts rlang/purrr style anonymous functions for the 
-  `fun` parameter (@dkahle, #3159).
+* `element_line()` now fills closed arrows (@yutannihilation, #2924).
 
-* `geom_polygon()` can now draw polygons with holes using the new `subgroup` 
-  aesthetic. This functionality requires R 3.6 (@thomasp85, #3128)
+* Facet strips on the left side of plots now have clipping turned on, preventing
+  text from running out of the strip and borders from looking thicker than for
+  other strips (@karawoo, #2772 and #3061).
 
-* `x0` and `y0` is now recognized positional aesthetics so they will get scaled 
-  if used in extension geoms and stats (@thomasp85, #3168)
+* ggplot2 now works in Turkish locale (@yutannihilation, #3011).
+
+* ggplot2 no longer attaches any external packages when using functions that 
+  depend on packages that are suggested but not imported by ggplot2. The 
+  affected functions include `geom_hex()`, `stat_binhex()`, 
+  `stat_summary_hex()`, `geom_quantile()`, `stat_quantile()`, and `map_data()` 
+  (@clauswilke, #3126).
+  
+* `geom_area()` and `geom_ribbon()` now sort the data along the x-axis in the 
+  `setup_data()` method rather than as part of `draw_group()` (@thomasp85, 
+  #3023)
 
-* Re-generate economics data. This leads to some changes in the values of all
-  columns (especially in `psavert`), but more importantly, strips the grouping
-  attributes from `economics_long`.
+* `geom_hline()`, `geom_vline()`, and `geom_abline()` now throw a warning if the 
+  user supplies both an `xintercept`, `yintercept`, or `slope` value and a 
+  mapping (@RichardJActon, #2950).
+
+* `geom_rug()` now works with `coord_flip()` (@has2k1, #2987).
+
+* Default labels are now generated more consistently; e.g., symbols no longer
+  get backticks, and long expressions are abbreviated with `...`
+  (@yutannihilation, #2981).
+
+* All-`Inf` layers are now ignored for picking the scale (@yutannihilation, 
+  #3184).
+  
+* Diverging Brewer colour palette now use the correct mid-point colour 
+  (@dariyasydykova, #3072).
+  
+* `scale_color_continuous()` now points to `scale_colour_continuous()` so that 
+  it will handle `type = "viridis"` as the documentation states (@hlendway, 
+  #3079).
+
+* `scale_shape_identity()` now works correctly with `guide = "legend"` 
+  (@malcolmbarrett, #3029)
+
+* `stat_bin()` will now error when the number of bins exceeds 1e6 to avoid 
+  accidentally freezing the user session (@thomasp85).
 
-* All-`Inf` layers are now ignored for picking the scale (@yutannihilation, #3184).
+* `stat_bin()` now handles data with only one unique value (@yutannihilation 
+  #3047).
 
 # ggplot2 3.1.0