matplotlib

The largest change within this release is a complete overhaul of text and font processing. Through the use of libraqm, HarfBuzz, SheenBidi, and an updated release of FreeType, all text should now support modern font features, enabling full internationalization in all languages. Not all features of these libraries are supported yet, but we expect this work to enable further improvements in an easier manner.

Outside of text handling, there are several improvements to 3D Axes, performance, new accessible colour sequences, flexible figure management, and more. See the release notes for more information.

This is the second release candidate for the meso release 3.11.0.

This release candidate fixes some problems with downstream packages, removes some missed deprecations, and corrects some additional minor bugs.

After an extended development stretch, we are pleased to announce the first release candidate of Matplotlib 3.11.0.

The largest change within this release is a complete overhaul of text and font processing. Through the use of libraqm, HarfBuzz, SheenBidi, and an updated release of FreeType, all text should now support modern font features, enabling full internationalization in all languages. Not all features of these libraries are supported yet, but we expect this work to enable further improvements in an easier manner. Due to the update to the font rendering stack, we cannot guarantee that text will be bit-for-bit perfect with previous releases, so if you are using Matplotlib for testing, it may be necessary to introduce/raise a tolerance within your tests.

Outside of text handling, there are several improvements to 3D Axes, performance, new accessible colour sequences, flexible figure management, and more. Final release notes are still being curated, but you may browse the list of new features, API changes, and all issues/pull requests on the milestone.

As a note for downstream packagers, the font libraries have only been tested against the versions bundled with the wheels. It may be possible to expand the range of requirements, or that a requirement is too broad. Please report any issues you have building against external dependencies.

This is a micro release of the v3.10.x series.
Highlights of this release include:

• Various minor bug and doc fixes
• Security hardening validation of cyclers - Removing eval usage
• Security hardening in Latex and PS calls - Removing shell escapes

This is a bugfix release in the 3.10.x series.

The primary highlights of this release are:

• Properly allow freethreaded mode in the MacOS backend
• Better error handling for MacOS backend

This is the latest bugfix release in the 3.10.x series.

The most important update in this release is that the minimum version of pyparsing has been updated to version 3.0.

This is a bugfix release in the 3.10.x series.

Highlights from this release include:

- Fix regression of hi-dpi support for Qt
- Fix race condition in TexManager.make_dvi & make_png
- Various documentation and other bugfixes

This is the fourth bugfix release of the 3.10.x series.

Included in this release is distributed wheels for Python 3.14 (including freethreaded) and Windows ARM.

There are also several smaller bugfixes.

This is the third bugfix release of the 3.10.x series

This is the first bugfix release of the 3.10.x series.

This release contains several bug-fixes and adjustments:

• Respect array alpha with interpolation_stage='rgba' in _Imagebase::_make_image
• Remove md5 usage to prevent issues on FIPS enabled systems
• Fix pyplot.matshow figure handling
• Fix modifying Axes' position also alters the original Bbox object used for initialization
• Fix title position for polar plots
• Add version gate to GTK4 calls when necessary
• Raise warning if both c and facecolors are used in scatter plot

As well as several documentation improvements and corrections.

Highlights of this release include:

- Preliminary support for free-threaded CPython 3.13
- New more-accessible color cycle
- Dark-mode diverging colormaps
- Exception handling control
- InsetIndicator artist
- FillBetweenPolyCollection
- Fill between 3D lines
- Data in 3D plots can now be dynamically clipped to the axes view limits
- Rotating 3d plots with the mouse
- Increased Figure limits with Agg renderer
- Subfigures no longer provisional
- Subfigures are now added in row-major order

This is the first release candidate for Matplotlib 3.10.0

This is the fourth bugfix release of the 3.9.x series.

This release contains two bug-fixes:

• Fix toolbar icons in GTK backend
• Fix Poly3DCollection initialization with list of lists

This is the third bugfix release of the 3.9.x series.

This release contains several bug-fixes and adjustments:

• Fix axline with extremely small slopes
• Fix axline with non-linear axis scales
• Fix minimumSizeHint with Qt backend
• Fix config directory usage when it's behind a symlink
• Fix draggable legend when blitting is enabled
• Fix high CPU utilization in the macosx backend
• Fix multiple hatch edgecolors passed to contourf
• Improve compatibility with pytest 8.2.0

This is the second bugfix release of the 3.9.x series.

This release contains several bug-fixes and adjustments:

• Be more resilient to I/O failures when writing font cache
• Fix nondeterministic behavior with subplot spacing and constrained layout
• Fix sticky edge tolerance relative to data range
• Improve formatting of image values in cases of singular norms

Windows wheels now bundle the MSVC runtime DLL statically to avoid inconsistencies with other wheels and random crashes depending on import order.

This is the first bugfix release of the 3.9.x series.

This release contains several bug-fixes and adjustments:

• Add GitHub artifact attestations for sdist and wheels
• Re-add matplotlib.cm.get_cmap; note this function will still be removed at a later date
• Allow duplicate backend entry points
• Fix Axes autoscaling of thin bars at large locations
• Fix Axes autoscaling with axhspan / axvspan
• Fix Axes3D autoscaling of Line3DCollection / Poly3DCollection
• Fix Axes3D mouse interactivity with non-default roll angle
• Fix box aspect ratios in Axes3D with alternate vertical axis
• Fix case handling of backends specified as module://...
• Fix crash with TkAgg on Windows with tk.window_focus: True
• Fix interactive update of SubFigures
• Fix interactivity when using the IPython console
• Fix pickling of AxesWidgets and SubFigures
• Fix scaling on GTK3Cairo / GTK4Cairo backends
• Fix text wrapping within SubFigures
• Promote mpltype Sphinx role to a public extension; note this is only intended for development reasons

Highlights of this release include:

• Plotting and Annotation improvements
  • Axes.inset_axes is no longer experimental
  • Legend support for Boxplot
  • Percent sign in pie labels auto-escaped with usetex=True
  • hatch parameter for stackplot
  • Add option to plot only one half of violin plot
  • axhline and axhspan on polar axes
  • Subplot titles can now be automatically aligned
  • axisartist can now be used together with standard Formatters
  • Toggle minorticks on Axis
  • StrMethodFormatter now respects axes.unicode_minus
• Figure, Axes, and Legend Layout
  • Subfigures now have controllable zorders
  • Getters for xmargin, ymargin and zmargin
• Mathtext improvements
  • mathtext documentation improvements
  • mathtext spacing corrections
• Widget Improvements
  • Check and Radio Button widgets support clearing
• 3D plotting improvements
  • Setting 3D axis limits now set the limits exactly
• Other improvements
  • New BackendRegistry for plotting backends
  • Add widths, heights and angles setter to EllipseCollection
  • image.interpolation_stage rcParam
  • Arrow patch position is now modifiable
  • NonUniformImage now has mouseover support

This is the second release candidate for the meso release 3.9.0.

This is the fourth micro release of the 3.8 series.

Highlights of the 3.8.4 release include:

• Enable building against numpy 2.0; released wheels are built against numpy 2
• macosx: Clean up single-shot timers correctly
• Add a draw during show for macos backend
• Fix color sequence data for Set2 and Set3
• gtk: Ensure pending draws are done before GTK draw
• Update "Created with" url in hand.svg
• Avoid modifying user input to Axes.bar
• fix quiver3d incorrect arrow colors

This is the third micro release of the 3.8 series.

Highlights of the 3.8.3 release include:

• Improvements to the MacOS backend
  • Fix hanging on plt.pause
  • Fix warnings about "Secure coding is not enabled for restorable state"
• Fix crash at exit for PGF backend

REL: v3.8.2

This is the second bugfix release of the 3.8 series.

Highlights of this release include:

• Fix a segfault in the MacOS backend when running on Python 3.12
• Fix Contour labeling manual positions selecting incorrect contours.
• Various documentation improvements

This is the first bugfix release of the 3.8.x series.

This release contains several bug fixes and adjustments:

• Bump setuptools required version because of setuptools_scm v8
• Update find_nearest_contour and revert contour deprecations
• allsegs and allkinds return individual segments
• Restore default behavior of hexbin mincnt with C provided
• Try/except import of Axes3D
• Ensure valid path mangling for ContourLabeler
• BLD: Remove development dependencies from sdists
• FIX 2-tuple of colors in to_rgba_array
• Fix issue with non-string labels and legend
• Fix issue with locale comma when not using math text
• Various type hinting improvements
• Various documentation improvements
• Improvements to the MacOS backend

REL: v3.8.0

Highlights of this release include:

• Type hints for most public APIs
• Many improvements to Mathtext
  • Addition of \boldsymbol command
  • Additional sizable delimiters
  • Documentation improvements
  • \substack command
  • \middle delimitier
  • \mathbfit for bold italic text
• 3D plotting improvements
  • Specify tick/axis label positions
  • Improved text for coordinates in interactive sessions
  • Ability to share view angles
• New plotting method ecdf (empirical cumulative distribution function)

First release candidate for Matplotlib v3.8.0

This is the fifth bugfix release of the 3.7.x series.

This release contains two bug-fixes:

• Fix hanging on plt.pause on the MacOS backend
• Fix crash on exit when using the PGF backend on Windows

This is the fourth bugfix release of the 3.7.x series.

This release contains one bug-fix:

• Fix a segmentation fault when resizing on Python 3.12 and macOS 14

This is the third bugfix release of the 3.7.x series.

This release contains several bug-fixes and adjustments:

• Add Python 3.12 wheels
• Update the license for the bundled colorbrewer colormap data
• Fix Cairo backend when using cairocffi
• Fix axes_grid1 inset axes with bbox_inches=tight
• Fix bugs in Path3DCollection / Poly3DCollection constructors
• Fix setting array labelcolor on Tick
• Improve compatibility with latest NumPy
• Stop warning when calling tight_layout multiple times

This is the second bugfix release of the 3.7.x series.

This release contains several bug-fixes and adjustments:

• Avoid modifying input masks in pcolor/pcolormesh
• Fix 3D set_aspect error cases
• Fix IPython's %pylab mode detection
• Fix Figure.get_constrained_layout_pads()
• Fix Legend.set_draggable() with update="bbox"
• Fix TransformedBbox.{,full_}contains
• Fix clipping of bar_label text
• Fix colorbar size when saving with explicit bbox_inches
• Fix errors when an input is entirely NaN
• Fix leaks of exception tracebacks and LayoutGrid objects
• Fix non-interpolated imshow in PDF export
• Fix palettized image optimization in PDF export
• Fix pgf tests with TeXLive 2022
• Fix removal of Axes that contain widgets that are grabbing the mouse
• Fix removal of draggable artists
• Fix subslice optimization for long, fully nan lines
• Fix tight layout if Figure has an existing layout manager
• Fix window extent of AnnotationBbox before first draw
• Fix wspace and hspace in subfigures
• Improve Qt compatibility
• Improve compatibility with Python 3.12
• Prevent under the hood downcasting of values in xcorr
• Remove some NumPy function overrides from pylab
• Remove warning with symlog scales on mouseover

This is the first bugfix release of the 3.7.x series.

This release contains several bug-fixes and adjustments:

• Ensure Qhull license is included in binary wheels
• Fix application of rcParams on Axes labels
• Fix compatibility with Pandas datetime unit converter
• Fix compatibility with latest GTK4
• Fix import of styles with relative path
• Fix Lasso unresponsiveness when clicking and immediately releasing
• Fix pickling of draggable legends
• Fix RangeSlider.set_val when new value is outside existing value
• Fix size of Tk spacers when changing display DPI
• Fix wrapped text in constrained layout
• Improve compatibility with third-party backends
• Improve error if animation save path does not exist

Highlights of this release include:

• Plotting and Annotation improvements - hatch parameter for pie - Polar plot errors drawn in polar coordinates - Additional format string options in ~matplotlib.axes.Axes.bar_label - ellipse boxstyle option for annotations - The extent of imshow can now be expressed with units - Reversed order of legend entries - pcolormesh accepts RGB(A) colors - View current appearance settings for ticks, tick labels, and gridlines - Style files can be imported from third-party packages

• Improvements to 3D Plotting - 3D plot pan and zoom buttons - adjustable keyword argument for setting equal aspect ratios in 3D - Poly3DCollection supports shading - rcParam for 3D pane color

• Figure and Axes Layout - colorbar now has a location keyword argument - Figure legends can be placed outside figures using constrained_layout - Per-subplot keyword arguments in subplot_mosaic - subplot_mosaic no longer provisional

• Widget Improvements - Custom styling of button widgets - Blitting in Button widgets

• Other Improvements - Source links can be shown or hidden for each Sphinx plot directive - Figure hooks

• New & Improved Narrative Documentation - Brand new Animations tutorial. - New grouped and stacked bar chart examples. - New section for new contributors and reorganized git instructions in the contributing guide. - Restructured /tutorials/text/annotations tutorial.

First release candidate for 3.7.0

This is the third bugfix release of the 3.6.x series.

This release contains several bug-fixes and adjustments:

• Fix Artist removal from axes_grid1 Axes classes
• Fix inset_locator in subfigures
• Fix scatter on masked arrays with units
• Fix colorbar ticks with log norm contours
• Fix deprecation warnings in GTK4 backend
• Fix using relative paths in HTMLWriter
• Improve failure message from rcParams string validation for tuple inputs
• Improve performance of QtAgg backends
• No longer modify pil_kwargs argument to imsave and savefig

This is the second bugfix release of the 3.6.x series.

This release contains several bug-fixes and adjustments:

• Avoid mutating dictionaries passed to subplots
• Fix bbox_inches='tight' on a figure with constrained layout enabled
• Fix auto-scaling of ax.hist density with histtype='step'
• Fix compatibility with PySide6 6.4
• Fix evaluating colormaps on non-NumPy arrays
• Fix key reporting in pick events
• Fix thread check on PyPy 3.8
• Handle input to ax.bar that is all NaN
• Make rubber band more visible on Tk and Wx backends
• Restore (and warn on) seaborn styles in style.library
• Restore get_renderer function in deprecated tight_layout
• nb/webagg: Fix resize handle on WebKit browsers (e.g., Safari)

This is the first bugfix release of the 3.6.x series.

This release contains several bug-fixes and adjustments:

• A warning is no longer raised when constrained layout explicitly disabled and tight layout is applied
• Add missing get_cmap method to ColormapRegistry
• Adding a colorbar on a ScalarMappable that is not attached to an Axes is now deprecated instead of raising a hard error
• Fix barplot being empty when first element is NaN
• Fix FigureManager.resize on GTK4
• Fix fill_between compatibility with NumPy 1.24 development version
• Fix hexbin with empty arrays and log scaling
• Fix resize_event deprecation warnings when creating figure on macOS
• Fix build in mingw
• Fix compatibility with PyCharm's interagg backend
• Fix crash on empty Text in PostScript backend
• Fix generic font families in SVG exports
• Fix horizontal colorbars with hatches
• Fix misplaced mathtext using eqnarray
• stackplot no longer changes the Axes cycler

Highlights of this release include:

• Figure and Axes creation / management
  • subplots, subplot_mosaic accept height_ratios and width_ratios arguments
  • Constrained layout is no longer considered experimental
  • New layout_engine module
  • Compressed layout added for fixed-aspect ratio Axes
  • Layout engines may now be removed
  • Axes.inset_axes flexibility
  • WebP is now a supported output format
  • Garbage collection is no longer run on figure close
• Plotting methods
  • Striped lines (experimental)
  • Custom cap widths in box and whisker plots in bxp and boxplot
  • Easier labelling of bars in bar plot
  • New style format string for colorbar ticks
  • Linestyles for negative contours may be set individually
  • Improved quad contour calculations via ContourPy
  • errorbar supports markerfacecoloralt
  • streamplot can disable streamline breaks
  • New axis scale asinh (experimental)
  • stairs(..., fill=True) hides patch edge by setting linewidth
  • Fix the dash offset of the Patch class
  • Rectangle patch rotation point
• Colors and colormaps
  • Color sequence registry
  • Colormap method for creating a different lookup table size
  • Setting norms with strings
• Titles, ticks, and labels
  • plt.xticks and plt.yticks support minor keyword argument
• Legends
  • Legend can control alignment of title and handles
  • ncol keyword argument to legend renamed to ncols
• Markers
  • marker can now be set to the string "none"
  • Customization of MarkerStyle join and cap style
• Fonts and Text
  • Font fallback
  • List of available font names
  • math_to_image now has a color keyword argument
  • Active URL area rotates with link text
• rcParams improvements
  • Allow setting figure label size and weight globally and separately from title
  • Mathtext parsing can be disabled globally
  • Double-quoted strings in matplotlibrc
• 3D Axes improvements
  • Standardized views for primary plane viewing angles
  • Custom focal length for 3D camera
  • 3D plots gained a 3rd "roll" viewing angle
  • Equal aspect ratio for 3D plots
• Interactive tool improvements
  • Rotation, aspect ratio correction and add/remove state
  • MultiCursor now supports Axes split over multiple figures
  • PolygonSelector bounding boxes
  • Setting PolygonSelector vertices
  • SpanSelector widget can now be snapped to specified values
  • More toolbar icons are styled for dark themes
• Platform-specific changes
  • Wx backend uses standard toolbar
  • Improvements to macosx backend
    • Modifier keys handled more consistently
    • savefig.directory rcParam support
    • figure.raise_window rcParam support
    • Full-screen toggle support
    • Improved animation and blitting support
  • macOS application icon applied on Qt backend
  • New minimum macOS version
  • Windows on ARM support

Second release candidate for 3.6.0

First release candidate for 3.6.0

This is the third bugfix release of the 3.5.x series.

This release contains several bug-fixes and adjustments:

• Fix alignment of over/under symbols
• Fix bugs in colorbars:
  • alpha of extensions
  • drawedges=True with extensions
  • handling of panchor=False
• Fix builds on Cygwin and IBM i
• Fix contour labels in SubFigures
• Fix cursor output:
  • for imshow with all negative values
  • when using BoundaryNorm
• Fix interactivity in IPython/Jupyter
• Fix NaN handling in errorbar
• Fix NumPy conversion from AstroPy unit arrays
• Fix positional markerfmt passed to stem
• Fix unpickling:
  • crash loading in a separate process
  • incorrect DPI when HiDPI screens

This is the second bugfix release of the 3.5.x series.

This release contains several bug-fixes and adjustments:

• Add support for Windows on ARM (source-only; no wheels provided yet)
• Add year to concise date formatter when displaying less than 12 months
• Disable QuadMesh mouse cursor to avoid severe performance regression in pcolormesh
• Delay backend selection to allow choosing one in more cases
• Fix automatic layout bugs in EPS output
• Fix autoscaling of scatter plots
• Fix clearing of subfigures
• Fix colorbar exponents, inversion of extensions, and use on inset axes
• Fix compatibility with various NumPy-like classes (e.g., Pandas, xarray, etc.)
• Fix constrained layout bugs with mixed subgrids
• Fix errorbar with dashes
• Fix errors in conversion to GTK4 and Qt6
• Fix figure options accidentally re-ordering data
• Fix keyboard focus of TkAgg backend
• Fix manual selection of contour labels
• Fix path effects on text with whitespace
• Fix quiver in subfigures
• Fix RangeSlider.set_val displaying incorrectly
• Fix regressions in collection data limits
• Fix stairs with no edgecolor
• Fix some leaks in Tk backends
• Fix tight layout DPI confusion
• Fix tool button customizability and some tool manager bugs
• Only set Tk HiDPI scaling-on-map for Windows systems
• Partially allow TTC font collection files by selecting the first font

This is the first bugfix release of the 3.5.x series.

This release contains several critical bug-fixes:

• fix installation issues when setting a default backend
• fix add_lines on horizontal colorbars
• fix streamplot with start points on right or top edge
• fix colorbars with boundaries or NoNorm
• fix colorbars with negative contours
• fix colorbars with tight layout
• fix setting Axis label alignment to center
• fix subfigure tight bounding box
• fix subplot parameter window on macosx backend
• fix unit handling in Collections.set_offsets
• fix unyt integration in errorbar
• re-display date offset in ConciseDataFormatter after zoom
• reduce do_3d_projection deprecation warnings in external artists

Highlights of this release include:

• Figure and Axes creation / management
  • subplot_mosaic supports simple Axes sharing
  • Figure now has draw_without_rendering method
  • Figure __init__ passes keyword arguments through to set
• Plotting methods
  • Add Annulus patch
  • set_data method for FancyArrow patch
  • New arrow styles in ArrowStyle and ConnectionPatch
  • Setting collection offset transform after initialization
• Colors and colormaps
  • Colormap registry (experimental)
  • Image interpolation now possible at RGBA stage
  • imshow supports half-float arrays
  • A callback registry has been added to Normalize objects
• Titles, ticks, and labels
  • Settings tick positions and labels simultaneously in set_ticks
• Fonts and Text
  • Triple and quadruple dot mathtext accents
  • Font properties of legend title are configurable
  • Text and TextBox parse_math option
  • Text can be positioned inside TextBox widget
  • Simplified font setting for usetex mode
  • Type 42 subsetting is now enabled for PDF/PS backends
• rcParams improvements
  • Allow setting default legend labelcolor globally
• 3D Axes improvements
  • Axes3D now allows manual control of draw order
  • Allow changing the vertical axis in 3D plots
  • plot_surface supports masked arrays and NaNs
  • 3D plotting methods support data keyword argument
• Interactive tool improvements
  • Colorbars now have pan and zoom functionality
  • Updated appearance of Slider widgets
  • Selector additions of clearing, dragging, and removal
  • CallbackRegistry objects gain a method to temporarily block signals
  • Directional sizing cursors
• Sphinx extensions
  • More configuration of mathmpl sphinx extension
• Backend-specific improvements
  • New GTK4 backend
  • New Qt6 backend
  • HiDPI support in Cairo-based, GTK, and Tk backends
  • Qt figure options editor improvements
  • WX backends support mouse navigation buttons
  • WebAgg uses asyncio instead of Tornado

First release candidate for v3.5.0

This is the third bugfix release of the 3.4.x series.

This release contains several critical bug-fixes:

• Clarify deprecation of Axes.figbox
• Disable MultiCursor widget on Axes subplots which it is not tracking
• Don't simplify path in LineCollection.get_segments
• Fix DPI in subfigures, affecting tick spacing, and scatter marker size
• Fix broken EPS output when using Type 42 STIX fonts
• Fix change in tick behaviour when calling Axes.clear
• Fix class docstrings for Norms created from Scales
• Fix compatibility with NumPy 1.21.0
• Fix crash on broken TrueType fonts
• Fix incorrect hits from Path.intersects_path
• Fix leak if affine_transform is passed invalid vertices
• Fix legends of stackplot with edgecolors='face'
• Fix plot directive when building in parallel
• Fix supxlabel and supylabel behaviour in constrained layout
• Fix tests with latest Inkscape and Ghostscript
• Improve DateFormatter styling for month names when usetex=True
• Re-disable autoscaling after interactive zoom
• Work around bug in Pillow 8.3.0

This is the second bugfix release of the 3.4.x series.

This release contains several critical bug-fixes:

• Generate wheels usable on older PyPy7.3.{0,1}
• Fix compatibility with Python 3.10
• Add subplot_mosaic Axes in the order the user gave them to us
• Correctly handle 'none' facecolors in do_3d_projection
• Ensure that Matplotlib is importable even if there's no HOME
• Fix CenteredNorm with halfrange
• Fix bar_label for bars with NaN values
• Fix clip paths when zoomed such that they are outside the figure
• Fix creation of RangeSlider with valinit
• Fix handling of "d" glyph in backend_ps, fixing EPS output
• Fix handling of datetime coordinates in pcolormesh with Pandas
• Fix processing of some errorbar arguments
• Fix removal of shared polar Axes
• Fix resetting grid visibility
• Fix subfigure indexing error and tight bbox
• Fix textbox cursor color
• Fix TkAgg event loop error on window close
• Ignore errors for sip with no setapi (Qt4Agg import errors)

This is the first bugfix release of the 3.4.x series.

This release contains several critical bug-fixes:

• fix errorbar when specifying fillstyle
• fix Inkscape cleanup at exit on Windows for tests
• fix legends of colour-mapped scatter plots
• fix positioning of annotation fancy arrows
• fix size and color rendering for 3D scatter plots
• fix suptitle manual positioning when using constrained layout
• respect antialiasing settings in cairo backends as well

Highlights of this release include:

• Figure and Axes creation / management
  • New subfigure functionality
  • Single-line string notation for subplot_mosaic
  • Changes to behavior of Axes creation methods (gca, add_axes, add_subplot)
  • add_subplot/add_axes gained an axes_class parameter
  • Subplot and subplot2grid can now work with constrained layout
• Plotting methods
  • axline supports transform parameter
  • New automatic labeling for bar charts
  • A list of hatches can be specified to bar and barh
  • Setting BarContainer orientation
  • Contour plots now default to using ScalarFormatter
  • Axes.errorbar cycles non-color properties correctly
  • errorbar errorevery parameter matches markevery
  • hexbin supports data reference for C parameter
  • Support callable for formatting of Sankey labels
  • Axes.spines access shortcuts
  • New stairs method and StepPatch artist
  • Added orientation parameter for stem plots
  • Angles on Bracket arrow styles
  • TickedStroke patheffect
• Colors and colormaps
  • Collection color specification and mapping
  • Transparency (alpha) can be set as an array in collections
  • pcolormesh has improved transparency handling by enabling snapping
  • IPython representations for Colormap objects
  • Colormap.set_extremes and Colormap.with_extremes
  • Get under/over/bad colors of Colormap objects
  • New cm.unregister_cmap function
  • New CenteredNorm for symmetrical data around a center
  • New FuncNorm for arbitrary normalizations
  • GridSpec-based colorbars can now be positioned above or to the left of the main axes
• Titles, ticks, and labels
  • supxlabel and supylabel
  • Shared-axes subplots tick label visibility is now correct for top or left labels
  • An iterable object with labels can be passed to Axes.plot
• Fonts and Text
  • Text transform can rotate text direction
  • matplotlib.mathtext now supports overset and underset LaTeX symbols
  • math_fontfamily parameter to change Text font family
  • TextArea/AnchoredText support horizontalalignment
  • PDF supports URLs on Text artists
• rcParams improvements
  • New rcParams for dates: set converter and whether to use interval_multiples
  • Date formatters now respect usetex rcParam
  • Setting image.cmap to a Colormap
  • Tick and tick label colors can be set independently using rcParams
• 3D Axes improvements
  • Errorbar method in 3D Axes
  • Stem plots in 3D Axes
  • 3D Collection properties are now modifiable
  • Panning in 3D Axes
• Interactive tool improvements
  • New RangeSlider widget
  • Sliders can now snap to arbitrary values
  • Pausing and Resuming Animations
• Sphinx extensions
  • plot_directive caption option
• Backend-specific improvements
  • Consecutive rasterized draws now merged
  • Support raw/rgba frame format in FFMpegFileWriter
  • nbAgg/WebAgg support middle-click and double-click
  • nbAgg support binary communication
  • Indexed color for PNG images in PDF files when possible
  • Improved font subsettings in PDF/PS
  • Kerning added to strings in PDFs
  • Fully-fractional HiDPI in QtAgg
  • wxAgg supports fullscreen toggle

This is the third release candidate for Matplotlib 3.4.0.

This is the second release candidate for Matplotlib 3.4.0.

This is the first release candidate for Matplotlib 3.4.0.

This is the fourth bugfix release of the 3.3.x series.

This release contains several critical bug-fixes:

• Fix WebAgg initialization.
• Fix parsing QT_API setting with mixed case.
• Fix build with link-time optimization disabled in environment.
• Fix test compatibility with NumPy 1.20.
• Fix test compatibility with pytest 6.2.

This is the third bugfix release of the 3.3.x series.

This release contains several critical bug-fixes:

• Fix calls to Axis.grid with argument visible=True.
• Fix fully masked imshow.
• Fix inconsistent color mapping in scatter for 3D plots.
• Fix notebook/nbAgg figures when used with ipywidgets in the same cell.
• Fix notebook/nbAgg/WebAgg on older (e.g., Firefox ESR) browsers.
• Fix pcolormesh with datetime coordinates.
• Fix performance regression with datetimes.
• Fix singular ticks with small log ranges.
• Fix timers/animations on wx and notebook backends.
• Remove certifi as a hard runtime dependency.

This is the second bugfix release of the 3.3.x series.

This release contains several critical bug-fixes:

• fix Axis scale on twinned Axes
• fix auto-close of Figures in nbagg
• fix automatic title placement if Axes is off the Figure
• fix autoranging of log scales with barstacked histogram
• fix extra redraws when using Button or TextBox widgets
• fix imshow with LogNorm and large vmin/vmax ranges
• fix plotting Pandas DataFrame with string MultiIndex
• fix scatter with marker=''
• fix scatter3d color/linewidth re-projection
• fix state of mode buttons in TkAgg backends
• include license files in built distribution
• reduce Visual C++ runtime requirements on Windows

This is the first bugfix release of the 3.3.x series.

This release contains several critical bug-fixes:

• fix docstring import issues when running Python with optimization
• fix hist with categorical data, such as with Pandas
• fix install on BSD systems
• fix nbagg compatibility with Chrome 84+
• fix ordering of scatter marker size in 3D plots
• fix performance regression when plotting Paths
• fix reading from URL in imread
• fix several regressions with new date epoch handling
• fix some bad constrained and tight layout interactions with colorbars
• fix use of customized toolbars in TkAgg and WXAgg backends

Highlights of this release include:

• Provisional API for composing semantic axes layouts from text or nested lists
• New Axes.sharex, Axes.sharey methods
• Turbo colormap
• colors.BoundaryNorm supports extend keyword argument
• Text color for legend labels
• Pcolor and Pcolormesh now accept shading='nearest' and 'auto'
• Allow tick formatters to be set with str or function inputs
• New Axes.axline method
• Dates use a modern epoch
• Improved font weight detection
• Axes3D no longer distorts the 3D plot to match the 2D aspect ratio
• More consistent toolbar behavior across backends
• Toolbar icons are now styled for dark themes
• Cursor text now uses a number of significant digits matching pointing precision
• Functions to compute a Path's size
• savefig() gained a backend keyword argument
• Saving SVG now supports adding metadata
• Saving PDF metadata via PGF now consistent with PDF backend
• NbAgg and WebAgg no longer use jQuery & jQuery UI

For the full details please see the What's New and API changes in the documentation.

This is the second bugfix release of the 3.2.x series.

This release contains several critical bug-fixes:

• support fractional HiDPI scaling with Qt backends
• support new Python and fix syntax errors in legacy Python
• support new Qt 5 and fix support for Qt 4
• fix animation writer fallback
• fix figure resizing
• fix handling of large arcs
• fix issues with tight layout
• fix saving figures after closing windows or under certain size conditions
• fix scatter when specifying a single color
• fix several memory leaks
• fix unexpected autoscaling behavior
• fix various issues with usetex
• various minor bug and documentation fixes