Updated version v4.9.0

VDovidaytis-HORIS · VDovidaytis-HORIS · commit 130891f9e73f · 2026-03-11T18:12:12.000+01:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -5,6 +5,118 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [4.9.0] - 2026-03-11
+
+### Added
+
+- Python 3.14 support.
+
+- Python 3.14 free-threading support [[#1454](https://github.com/JetBrains/lets-plot/issues/1454)].
+
+
+- Plot Annotations:
+
+  - New `labels` parameter in `geom_smooth()` designed to display statistical summaries of the fitted model directly on the plot. \
+    This parameter accepts a `smooth_labels()` object, which provides access to model-specific variables like $R^2$, the regression equation and others.
+
+    See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/smooth_summary.html).
+
+  - **Plot tags**. A tag can be specified via `labs(tag=...)` and styled using theme parameters [[#1407](https://github.com/JetBrains/lets-plot/issues/1407)].
+
+    See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/plot_tags.html) and updated [plot layout scheme](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/plot_layout_scheme.html).
+
+  - Plot tags customization parameters in `theme()`:
+    - `plot_tag` - sets the tag style via `element_text()`.
+    - `plot_tag_location` - specifies the area used for positioning the tag.
+    - `plot_tag_position` - specifies the position of the tag within the selected area.
+    - `plot_tag_prefix` - text added before the tag value.
+    - `plot_tag_suffix` - text added after the tag value.
+
+    See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/plot_tags.html).
+
+
+- Geometries:
+  - New `geom_bracket()`, `geom_bracket_dodge()` [[#1114](https://github.com/JetBrains/lets-plot/issues/1114)].
+
+    See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/geom_bracket.html).
+
+  - `geom_imshow()`:
+    - Support for custom colormaps [[#780](https://github.com/JetBrains/lets-plot/issues/780)].
+    - New `cguide` parameter: use to customize the colorbar for grayscale images.
+
+      See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/image_custom_cmap.html).
+
+
+- Color Scales:
+  - New `palette()` method for color scales: generates a list of hex color codes that can be used with `scale_color_manual()` to maintain consistent colors across multiple plots [[#1444](https://github.com/JetBrains/lets-plot/issues/1444)].
+
+    See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/scale_color_palette.html).
+
+  - New `overflow` parameter in `scale_color_brewer()` / `scale_fill_brewer()`: controls how colors are generated when more colors are needed than the palette provides. \
+    Options: `'interpolate'` (`'i'`), `'cycle'` (`'c'`), `'generate'` (`'g'`).
+
+    See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/scale_brewer_overflow.html).
+
+
+- Positional Scales:
+  - New `break_width` parameter that specifies a fixed distance between axis breaks.
+
+    See examples:
+    - [datetime scale](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/scale_break_width_datetime.html)
+    - [time (duration) scale](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/scale_break_width_duration.html)
+    - [log10 scale](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/scale_break_width_log10.html)
+
+  - Support for axis minor ticks via `axis_minor_ticks` and `axis_minor_ticks_length` parameters in `theme()` [[#1379](https://github.com/JetBrains/lets-plot/issues/1379)].
+
+    See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/axis_minor_ticks.html).
+
+
+- `gggrid()`: interactive pan/zoom now propagates across subplots with shared axes (`sharex`/`sharey`) [[#1413](https://github.com/JetBrains/lets-plot/issues/1413)].
+
+  See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/gggrid_scale_share_zoom.html).
+
+
+### Changed
+
+- [**BREAKING**]: ColorBrewer palettes: changed default behavior when the requested number of colors exceeds the palette's maximum size. \
+  Now defaults to `'interpolate'` for sequential/diverging palettes and `'generate'` for qualitative palettes. \
+  Previously, depending on the palette type, this either resulted in duplicate colors or random additional colors. \
+  Use the new `overflow` parameter to explicitly control this behavior.
+- Reduced import overhead by nearly two orders of magnitude (from ~1.2s down to ~0.02s) [[#1469](https://github.com/JetBrains/lets-plot/issues/1469)].
+- Missing values in `geom_area_ridges()` create gaps in geometries instead of being interpolated over.
+- Discrete color scales (Brewer, Manual) now produce a `colorbar` guide when used with continuous data. \
+  Previously they produced a `legend` guide regardless of the data type.
+
+
+- Changes affecting users on the JVM platform:
+  - Upgraded the Kotlin version to 2.2.20 (was 1.9.25).
+  - New artifact for JVM Swing applications: `org.jetbrains.lets-plot:lets-plot-swing`. \
+    This artifact provides the `SwingPlotPanel` class, which can be used to display plots in Swing applications instead of the now-obsolete `DefaultPlotPanelBatik`. \
+    For details, see the [jvm-swing-app](https://github.com/alshan/lets-plot-mini-apps/tree/main/jvm-swing-app) example in the "lets-plot-mini-apps" repository.
+  - [**BREAKING**]: Removed JavaFX artifacts. \
+    The `org.jetbrains.lets-plot:lets-plot-jfx` artifact is no longer available. \
+    Replace it with new `org.jetbrains.lets-plot:lets-plot-swing` dependency and use `SwingPlotPanel` instead of `DefaultPlotPanelJfx`. \
+    For details, see the [jvm-javafx-app](https://github.com/alshan/lets-plot-mini-apps/tree/main/jvm-javafx-app) example in the "lets-plot-mini-apps" repository.
+  - [**BREAKING**]: Removed `plot-image-export` module. \
+    The `org.jetbrains.lets-plot:lets-plot-image-export` artifact is no longer available. \
+    The `PlotImageExport` utility has been moved to the `platf-awt` module. \
+    The required `org.jetbrains.lets-plot:platf-awt` dependency is likely already present in your project.
+
+
+### Fixed
+
+- Drop commons-io dependency [[#1421](https://github.com/JetBrains/lets-plot/issues/1421)].
+- Unexpected replacement of double curly brackets with a single curly bracket [[#1433](https://github.com/JetBrains/lets-plot/issues/1433)].
+- Upgrade to a newer version of ws [[#1150](https://github.com/JetBrains/lets-plot/issues/1150)].
+- geom_imshow: unclear error message when mixing transparencies [[#1088](https://github.com/JetBrains/lets-plot/issues/1088)].
+- geom_imshow and scale_y_reverse [[#1210](https://github.com/JetBrains/lets-plot/issues/1210)].
+- Nice to be able to get a list of colors from a color scale object [[#1444](https://github.com/JetBrains/lets-plot/issues/1444)].
+- Allow tooltips param to accept list [[#1455](https://github.com/JetBrains/lets-plot/issues/1455)].
+- Allow grouped tooltips for plots with multiple univariate geoms [[#1460](https://github.com/JetBrains/lets-plot/issues/1460)].
+- Fixed a regression in geom_text_repel() / geom_label_repel(): points with empty labels were incorrectly skipped \
+  before building the repel obstacle set, so they were not included in collision avoidance and labels could overlap \
+  dense point clusters.
+
 ## [4.8.2] - 2026-12-19
 
 ### Fixed
diff --git a/build.gradle.kts b/build.gradle.kts
@@ -42,7 +42,7 @@ val letsPlotTaskGroup by extra { "lets-plot" }
 
 allprojects {
     group = "org.jetbrains.lets-plot"
-    version = "4.9.1-SNAPSHOT" // see also: python-package/lets_plot/_version.py
+    version = "4.9.0" // see also: python-package/lets_plot/_version.py
 //    version = "0.0.0-SNAPSHOT"  // for local publishing only
 
     // Generate JVM 1.8 bytecode
diff --git a/future_changes.md b/future_changes.md
@@ -1,112 +1,7 @@
-## [4.8.3] - 2026-03-dd
+## [4.9.1] - 2026-mm-dd
 
 ### Added
 
-- Python 3.14 support.
-
-- Python 3.14 free-threading support [[#1454](https://github.com/JetBrains/lets-plot/issues/1454)].
-
-
-- Plot Annotations:
-    
-  - New `labels` parameter in `geom_smooth()` designed to display statistical summaries of the fitted model directly on the plot. \
-    This parameter accepts a `smooth_labels()` object, which provides access to model-specific variables like $R^2$, the regression equation and others.
-
-    See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/smooth_summary.html).
-
-  - **Plot tags**. A tag can be specified via `labs(tag=...)` and styled using theme parameters [[#1407](https://github.com/JetBrains/lets-plot/issues/1407)].
-  
-    See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/plot_tags.html) and updated [plot layout scheme](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/plot_layout_scheme.html).
-                                                                                                                     
-  - Plot tags customization parameters in `theme()`:
-    - `plot_tag` - sets the tag style via `element_text()`.
-    - `plot_tag_location` - specifies the area used for positioning the tag.
-    - `plot_tag_position` - specifies the position of the tag within the selected area.
-    - `plot_tag_prefix` - text added before the tag value.
-    - `plot_tag_suffix` - text added after the tag value.
-   
-    See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/plot_tags.html).
-
-
-- Geometries:
-  - New `geom_bracket()`, `geom_bracket_dodge()` [[#1114](https://github.com/JetBrains/lets-plot/issues/1114)].
-
-    See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/geom_bracket.html).
-
-  - `geom_imshow()`:
-    - Support for custom colormaps [[#780](https://github.com/JetBrains/lets-plot/issues/780)].
-    - New `cguide` parameter: use to customize the colorbar for grayscale images.
-
-      See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/image_custom_cmap.html).
-
-
-- Color Scales:
-  - New `palette()` method for color scales: generates a list of hex color codes that can be used with `scale_color_manual()` to maintain consistent colors across multiple plots [[#1444](https://github.com/JetBrains/lets-plot/issues/1444)].
-
-    See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/scale_color_palette.html).
-
-  - New `overflow` parameter in `scale_color_brewer()` / `scale_fill_brewer()`: controls how colors are generated when more colors are needed than the palette provides. \
-    Options: `'interpolate'` (`'i'`), `'cycle'` (`'c'`), `'generate'` (`'g'`).
-
-    See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/scale_brewer_overflow.html).
-       
-
-- Positional Scales:
-  - New `break_width` parameter that specifies a fixed distance between axis breaks.
-
-    See examples:
-    - [datetime scale](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/scale_break_width_datetime.html)
-    - [time (duration) scale](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/scale_break_width_duration.html)
-    - [log10 scale](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/scale_break_width_log10.html)
-
-  - Support for axis minor ticks via `axis_minor_ticks` and `axis_minor_ticks_length` parameters in `theme()` [[#1379](https://github.com/JetBrains/lets-plot/issues/1379)].
-
-    See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/axis_minor_ticks.html).
-
-
-- `gggrid()`: interactive pan/zoom now propagates across subplots with shared axes (`sharex`/`sharey`) [[#1413](https://github.com/JetBrains/lets-plot/issues/1413)].
-
-    See: [example notebook](https://raw.githack.com/JetBrains/lets-plot/master/docs/f-26a/gggrid_scale_share_zoom.html).
-
-
-
 ### Changed
 
-- [**BREAKING**]: ColorBrewer palettes: changed default behavior when the requested number of colors exceeds the palette's maximum size. \
-  Now defaults to `'interpolate'` for sequential/diverging palettes and `'generate'` for qualitative palettes. \
-  Previously, depending on the palette type, this either resulted in duplicate colors or random additional colors. \
-  Use the new `overflow` parameter to explicitly control this behavior.
-- Reduced import overhead by nearly two orders of magnitude (from ~1.2s down to ~0.02s) [[#1469](https://github.com/JetBrains/lets-plot/issues/1469)]. 
-- Missing values in `geom_area_ridges()` create gaps in geometries instead of being interpolated over.
-- Discrete color scales (Brewer, Manual) now produce a `colorbar` guide when used with continuous data. \
-  Previously they produced a `legend` guide regardless of the data type.
-
-
-- Changes affecting users on the JVM platform:
-  - Upgraded the Kotlin version to 2.2.20 (was 1.9.25).
-  - New artifact for JVM Swing applications: `org.jetbrains.lets-plot:lets-plot-swing`. \
-    This artifact provides the `SwingPlotPanel` class, which can be used to display plots in Swing applications instead of the now-obsolete `DefaultPlotPanelBatik`. \
-    For details, see the [jvm-swing-app](https://github.com/alshan/lets-plot-mini-apps/tree/main/jvm-swing-app) example in the "lets-plot-mini-apps" repository.
-  - [**BREAKING**]: Removed JavaFX artifacts. \
-    The `org.jetbrains.lets-plot:lets-plot-jfx` artifact is no longer available. \
-    Replace it with new `org.jetbrains.lets-plot:lets-plot-swing` dependency and use `SwingPlotPanel` instead of `DefaultPlotPanelJfx`. \
-    For details, see the [jvm-javafx-app](https://github.com/alshan/lets-plot-mini-apps/tree/main/jvm-javafx-app) example in the "lets-plot-mini-apps" repository.
-  - [**BREAKING**]: Removed `plot-image-export` module. \
-    The `org.jetbrains.lets-plot:lets-plot-image-export` artifact is no longer available. \
-    The `PlotImageExport` utility has been moved to the `platf-awt` module. \
-    The required `org.jetbrains.lets-plot:platf-awt` dependency is likely already present in your project. 
-  
-
 ### Fixed
-
-- Drop commons-io dependency [[#1421](https://github.com/JetBrains/lets-plot/issues/1421)].
-- Unexpected replacement of double curly brackets with a single curly bracket [[#1433](https://github.com/JetBrains/lets-plot/issues/1433)].
-- Upgrade to a newer version of ws [[#1150](https://github.com/JetBrains/lets-plot/issues/1150)].
-- geom_imshow: unclear error message when mixing transparencies [[#1088](https://github.com/JetBrains/lets-plot/issues/1088)].
-- geom_imshow and scale_y_reverse [[#1210](https://github.com/JetBrains/lets-plot/issues/1210)].
-- Nice to be able to get a list of colors from a color scale object [[#1444](https://github.com/JetBrains/lets-plot/issues/1444)].
-- Allow tooltips param to accept list [[#1455](https://github.com/JetBrains/lets-plot/issues/1455)].
-- Allow grouped tooltips for plots with multiple univariate geoms [[#1460](https://github.com/JetBrains/lets-plot/issues/1460)].
-- Fixed a regression in geom_text_repel() / geom_label_repel(): points with empty labels were incorrectly skipped \
-  before building the repel obstacle set, so they were not included in collision avoidance and labels could overlap \
-  dense point clusters.
diff --git a/js-package/distr/lets-plot.min.js b/js-package/distr/lets-plot.min.js
diff --git a/python-package/lets_plot/_version.py b/python-package/lets_plot/_version.py
@@ -3,4 +3,4 @@
 # Use of this source code is governed by the MIT license that can be found in the LICENSE file.
 #
 # see: https://www.python.org/dev/peps/pep-0440/#developmental-releases
-__version__ = '4.9.1.dev1'
+__version__ = '4.9.0'

Original file line number	Diff line number	Diff line change
`@@ -3,4 +3,4 @@`
`3`	`3`	`# Use of this source code is governed by the MIT license that can be found in the LICENSE file.`
`4`	`4`	`#`
`5`	`5`	`# see: https://www.python.org/dev/peps/pep-0440/#developmental-releases`
`6`		`-__version__ = '4.9.1.dev1'`
	`6`	`+__version__ = '4.9.0'`