Version 1.10.1

Fixes:

• Fixed static HTML export of notebooks (#2574)
• Ensured Chord element allows recurrent edges (#2583)
• Restored behavior for inferring key dimensions order from XArray Dataset (#2579)
• Fixed Selection1D stream on bokeh server after changes in bokeh 0.12.15 (#2586)

Version 1.10.0

JupyterLab support:

• Full compatibility with JupyterLab when installing the jupyterlab_holoviews extension (#687)

New components:

• Added Sankey element to plot directed flow graphs (#1123)

• Added TriMesh element and datashading operation to plot small and large irregular meshes (#2143)

• Added a Chord element to draw flow graphs between different nodes (#2137, #2143)

• Added HexTiles element to plot data binned into a hexagonal grid (#1141)

• Added Labels element to plot a large number of text labels at once (as data rather than as annotations) (#1837)

• Added Div element to add arbitrary HTML elements to a Bokeh layout (#2221)

• Added PointDraw, PolyDraw, BoxEdit, and PolyEdit streams to allow drawing, editing, and annotating glyphs on a Bokeh plot, and syncing the resulting data to Python (#2268)

Features:

• Added radial HeatMap option to allow plotting heatmaps with a cyclic x-axis (#2139)

• All elements now support declaring bin edges as well as centers allowing Histogram and QuadMesh to become first class Dataset types (#547)

• When using widgets, their initial or default value can now be set via the Dimension.default parameter (#704)

• n-dimensional Dask arrays are now supported directly via the gridded dictionary data interface (#2305)

• Added new Styling Plots and Colormaps user guides, including new functionality for working with colormaps.

Enhancements:

• Improvements to exceptions (#1127)

• Toolbar position and merging (via a new merge_toolbar option) can now be controlled for Layout and Grid plots (#1977)

• Bokeh themes can now be applied at the renderer level (#1861)

• Dataframe and Series index can now be referenced by name when constructing an element (#2000)

• Option-setting methods such as .opts, .options and hv.opts now allow specifying the backend instead of defaulting to the current backend (#1801)

• Handled API changes in streamz 0.3.0 in Buffer stream (#2409)

• Supported GIF output on windows using new Matplotlib pillow animation support (#385)

• Provided simplified interface to rasterize most element types using datashader (#2465)

• Bivariate element now support levels as a plot option (#2099)

• NdLayout and GridSpace now consistently support * overlay operation (#2075)

• The Bokeh backend no longer has a hard dependency on Matplotlib (#829)

• DynamicMap may now return (Nd)Overlay with varying number of elements (#1388)

• In the notebook, deleting or re-executing a cell will now delete the plot and clean up any attached streams (#2141)

• Added color_levels plot option to set discrete number of levels during colormapping (#2483)

Fixes:

• Layout and Overlay objects no longer create lower-case nodes on attribute access (#2331)

• Dimension.step now correctly respects both integer and float steps (#1707)

• Fixed timezone issues when using linked streams on datetime axes (#2459)

Changes affecting backwards compatibility:

• Image elements now expect and validate regular sampling (#1869); for genuinely irregularly sampled data QuadMesh should be used.

• Tabular elements will no longer default to use ArrayInterface, instead preferring pandas and dictionary data formats (#1236)

• Cycle/Palette values are no longer zipped together; instead they now cycle independently (#2333)

• The default color Cycle was expanded to provide more unique colors (#2483)

• Categorical colormapping was made consistent across backends, changing the behavior of categorical Matplotlib colormaps (#2483)

• Disabled auto-indexable property of the Dataset baseclass, i.e. if a single column is supplied no integer index column is added automatically (#2522)

Version 1.9.5

This release includes a very small number of minor bugfixes and a new feature to simplify setting options in python:

Enhancements:

• Added .options method for simplified options setting. (#2306)

Fixes:

• Allow plotting bytes datausing the bokeh backend in python3 (#2357)
• Allow .range to work on data with heterogeneous types in Python 3 (#2345)
• Fixed bug streaming data containing datetimes using bokeh>=0.12.14 (#2383)

Version 1.9.4

This release contains a small number of important bug fixes:

• Compatibility with recent versions of dask and pandas (#2329)
• Fixed bug referencing columns containing non-alphanumeric characters in bokeh Tables (#2336)
• Fixed issue in regrid operation (2337)
• Fixed issue when using datetimes with datashader when processing ranges (#2344)

Version 1.9.3

This release contains a number of important bug fixes and minor enhancements.

Particular thanks to @jbampton, @ea42gh, @laleph, and @drs251 for a number of fixes and improvements to the documentation.

Enhancements:

• Optimized rendering of stream based OverlayPlots (#2253)
• Added merge_toolbars and toolbar options to control toolbars on Layout and Grid plots (#2289)
• Optimized rendering of VectorField (#2314)
• Improvements to documentation (#2198, #2220, #2233, #2235, #2316)
• Improved bokeh Table formatting (#2267)
• Added support for handling datetime.date types (#2267)
• Add support for pre- and post-process hooks on operations (#2246, #2334)

Fixes:

• Fix for bokeh server widgets (#2218)
• Fix using event based streams on bokeh server (#2239, #2256)
• Switched to drawing Distribution, Area and Spread using patch glyphs in bokeh fixing legends (#2225)
• Fixed categorical coloring of Polygons/Path elements in matplotlib (#2259)
• Fixed bug computing categorical datashader aggregates (#2295)
• Allow using Empty object in AdjointLayout (#2275)

API Changes:

• Renamed Trisurface to TriSurface for future consistency (#2219)

Version 1.9.2

This release is a minor bug fix release patching various issues which were found in the 1.9.1 release.

Enhancements:

• Improved the Graph element, optimizing the constructor and adding support for defining a edge_color_index (#2145)
• Added support for adding jitter to bokeh Scatter and Points plots (e56208)

Fixes:

• Ensure dimensions, group and label are inherited when casting Image to QuadMesh (#2144)
• Handle compatibility for bokeh version >= 0.12.11 (#2159)
• Fixed broken bokeh ArrowPlot (#2172)
• Fixed Pointer based streams on datetime axes (#2179)
• Allow constructing and plotting of empty Distribution and Bivariate elements (#2190)
• Added support for hover info on bokeh BoxWhisker plots (#2187)
• Fixed bug attaching streams to (Nd)Overlay types (#2194)

Version 1.9.1

This release is a minor bug fix release patching various issues which were found in the 1.9.0 release.

Enhancements:

• Exposed min_alpha parameter on datashader shade and datashade operations (#2109)

Fixes:

• Fixed broken bokeh server linked stream throttling (#2112)
• Fixed bug in bokeh callbacks preventing linked streams using bokeh's on_event callbacks from working (#2112)
• Fixed insufficient validation issue for Image and bugs when applying regrid operation to xarray based Images (#2117)
• Fixed handling of dimensions and empty elements in univariate_kde and bivariate_kde operations (#2103)

Version 1.9.0

This release includes a large number of long awaited features, improvements and bug fixes, including streaming and graph support, binary transfer of bokeh data, fast Image/RGB regridding, first-class statistics elements and a complete overhaul of the geometry elements.

Particular thanks to all users and contributers who have reported issues and submitted pull requests.

Features:

• The kdim and vdim keyword arguments are now positional making the declaration of elements much less verbose (e.g. Scatter(data, 'x', 'y')) (#1946)
• Added Graph, Nodes, and EdgePaths elements adding support for plotting network graphs (#1829)
• Added datashader-based regrid operation for fast Image and RGB regridding (#1773)
• Added support for binary transport when plotting with bokeh, providing huge speedups for dynamic plots, including those from datashader (#1894, #1896)
• Added Pipe and Buffer streams for streaming data support (#2011)
• Add support for datetime axes on Image and RGB, and when applying datashading and regridding operations (#2023)
• Added Distribution and Bivariate as first-class elements that can be plotted with matplotlib and bokeh without depending on seaborn, and thus now fully interactive in bokeh (#1985)
• Completely overhauled support for plotting geometries with Path, Contours and Polygons elements, including support for coloring individual segments and paths by value (#1991)

Enhancements:

• Add support for adjoining all elements on matplotlib plots (#1033)
• Improved exception handling for data interfaces (#2041)
• Add groupby argument to histogram operation (#1725)
• Add support for reverse sort on Dataset elements (#1843)
• Added support for invert_x/yaxis on all elements (#1872, #1919)

Fixes:

• Fixed a bug in matplotlib causing the first frame in gif and mp4 getting stuck (#1922)
• Fixed various issues with support for new nested categorical axes in bokeh (#1933)
• A long list of other bug fixes, too many to list here.

Changes affecting backwards compatibility:

• The contours operation no longer overlays the contours on top of the supplied Image by default and returns a single Contours/Polygons rather than an NdOverlay of them (#1991)
• The values of the Distribution element should now be defined as a key dimension (#1985)
• The seaborn interface was removed in its entirety being replaced by first class support for statistics elements such as Distribution and Bivariate (#1985)
• Since kdims and vdims can now be passed as positional arguments the bounds argument on Image is no longer positional (#1946).
• The datashade and shade cmap was reverted back to the datashader default blue, due to confusing behavior of the fire cmap against a white background (#2078)
• Dropped all support for bokeh versions older than 0.12.10, which was not being tested and was making the code complex and error-prone
• histogram operation now returns Histogram elements with less generic value dimension and customizable label (#1836)

Version 1.8.4

This bugfix release includes a number of critical fixes for compatiblity
with bokeh 0.12.9 along with various other bug fixes. Many thanks to our
users for various detailed bug reports, feedback and contributions.

Fixes:

• Fixes to register BoundsXY stream. (#1826)
• Fix for Bounds streams on bokeh server. (#1883)
• Compatibility with matplotlib 2.1 (#1842)
• Fixed bug in scrubber widget and support for scrubbing discrete (#1832)
• Various fixes for compatibility with bokeh 0.12.9 (#1849, #1866)
• Fixes for setting QuadMesh ranges. (#1876)
• Fixes for inverting Image/RGB/Raster axes in bokeh. (#1872)

Version 1.8.3

This bugfix release fixes a number of minor issues identified since the last release:

Features:

• Add support for setting the bokeh sizing_mode as a plot option (#1813)
  Fixes:

• Handle StopIteration on DynamicMap correctly. (#1792)

• Fix bug with linked streams on empty source element (#1725)

• Compatibility with latest datashader 0.6.0 release (#1773)

• Fixed missing HTML closing tag in extension (#1797, #1809)

• Various fixes and improvements for documentation (#1664, #1796)