Version 2.2.2

Bug Fixes

• fix missing JSON resource in altair.vega.v4 (#1097)

Version 2.2.1

Bug Fixes

• appropriate handling of InlineData in dataset consolidation (#1092)

• fix admonition formatting in documentation page (#1094)

Version 2.2.0

Enhancements

• better handling of datetimes and timezones (#1053)

• all inline datasets are now converted to named datasets and stored at the
  top level of the chart. This behavior can be disabled by setting
  alt.data_transformers.consolidate_datasets = False (#951 & #1046)

• more streamlined shorthand syntax for window transforms (#957)

Maintenance

• update from Vega-Lite 2.4.3 to Vega-Lite 2.6.0; see vega-lite change-logs 2.5.0 2.5.1 2.5.2 2.6.0

Backward-incompatible changes

• alt.SortField renamed to alt.EncodingSortField and
  alt.WindowSortField renamed to alt.SortField (#923)

Bug Fixes

• Fixed serialization of logical operands on selections within
  transform_filter(): (#1075)

• Fixed sphinx issue which embedded chart specs twice (#1088)

• Avoid Selenium import until it is actually needed (#982)

Version 2.1.0

Enhancements

• add a scale_factor argument to chart.save() to allow the
  size/resolution of saved figures to be adjusted. (#918)

• add an add_selection() method to add selections to charts (#832)

• add chart.serve() and chart.display() methods for more flexiblity
  in displaying charts (#831)

• allow multiple fields to be passed to encodings such as tooltip
  and detail (#830)

• make timeUnit specifications more succinct, by parsing them in a manner
  similar to aggregates (#866)

• make to_json() and to_csv() have deterministic filenames, so in json
  mode a single datasets will lead to a single on-disk serialization (#862)

Breaking Changes

• make data the first argument for all compound chart types to match the
  semantics of alt.Chart (this includes alt.FacetChart,
  alt.LayerChart, alt.RepeatChart, alt.VConcatChart, and
  alt.HConcatChart) (#895).

• update vega-lite to version 2.4.3 (#836)

  • Only API change is internal: alt.MarkProperties is now alt.MarkConfig

Maintenance

• update vega to v3.3 & vega-embed to v3.11 in html output & colab renderer (#838)

Version 2.0.0

Complete rewrite of Altair, focused on supporting Vega-Lite 2.X

Version 1.2.1

This version of Altair is based on Vega-Lite 1.2.1.

Major additions

• Support for JupyterLab/nteract through MIME based rendering. Enable this by calling enable_mime_rendering() before rendering visualizations (#216).

• Change default import in all code and docs to import altair as alt

• Check for missing and misspelled column names upon exporting or rendering, and raise FieldError (#399) if any problems are found. This can be disabled by setting Chart.validated_columns=False.

• Raise MaxRowsExceeded if the number of rows in the dataset is larger than Chart.max_rows to guard against sending large datasets to the browser.

• Move the Vega-Lite 1.x api into altair.v1 to make it easier for us to migrate to Vega-Lite 2.x and continue to support 1.x. No import change are needed as altair.v1 is aliased to altair in this release (#377).

• Moved the example notebooks into a separate repository (https://github.com/altair-viz/altair_notebooks) that has Binder support (#391).

• Add $schema to top-level JSON spec (#370).

• Minor documentation revisions.

Bug fixes

• Make sure default mark is a point (#344).

Version 1.2

Nov 7, 2016

Major additions

• Update to Vega-Lite 1.2 and make all its enhancements available to Altair
• Add Chart.serve method
  (#197)
• Add altair.expr machinery to specify transformations and filterings
  (#213)
• Add Chart.savechart method, which can output JSON, HTML, and (if Node
  is installed) PNG and SVG. See https://altair-viz.github.io/documentation/displaying.html

Bug Fixes

• Countless minor bug fixes

Maintenance:

• Update to Vega-Lite 1.2.1 and add its supported features
• Create website: http://altair-viz.github.io/
• Set up Travis to run conda & pip; and to build documentation

Version 1.0.0

Initial release of Altair