Software Open Access

rasbt/mlxtend: Version 0.19.0

Sebastian Raschka; James Bourbeau; Maitreyee Mhasakar; Reiichiro Nakano; Kota Mori; Zach Griffith; JJLWHarrison; Jakub Šmíd; Daniel; Francisco J. H. Heras; Guillaume Poirier-Morency; Qiang Gu; Colin; Floris Hoogenboom; Steve Harenberg; Vahid MIRJALILI; Denis Barbier; Marco Tiraboschi; hanzgs; Florian Charlier; Alejandro Correa Bahnsen; Gabriel Azevedo Ferreira; Janpreet Singh; João Pedro Zanlorensi Cardoso; Laurens Geffert; Oliver Tomic; Pablo Fernandez; Christos Aridas; Selay; Ackerley Tng


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    <subfield code="a">Version 0.19.0 (09/02/2021)
New Features
&lt;ul&gt;
&lt;li&gt;Adds a second "balanced accuracy" interpretation ("balanced") to &lt;code&gt;evaluate.accuracy_score&lt;/code&gt; in addition to the existing "average" option to compute the scikit-learn-style balanced accuracy. (&lt;a href="https://github.com/rasbt/mlxtend/pull/764"&gt;#764&lt;/a&gt;)&lt;/li&gt;
&lt;li&gt;Adds new &lt;code&gt;scatter_hist&lt;/code&gt; function to &lt;code&gt;mlxtend.plotting&lt;/code&gt; for generating a scattered histogram. (&lt;a href="https://github.com/rasbt/mlxtend/issues/757"&gt;#757&lt;/a&gt; via &lt;a href="https://github.com/Maitreyee1"&gt;Maitreyee Mhasaka&lt;/a&gt;)&lt;/li&gt;
&lt;li&gt;The &lt;code&gt;evaluate.permutation_test&lt;/code&gt; function now accepts a &lt;code&gt;paired&lt;/code&gt; argument to specify to support paired permutation/randomization tests. (&lt;a href="https://github.com/rasbt/mlxtend/pull/768"&gt;#768&lt;/a&gt;)&lt;/li&gt;
&lt;li&gt;The &lt;code&gt;StackingCVRegressor&lt;/code&gt; now also supports multi-dimensional targets similar to &lt;code&gt;StackingRegressor&lt;/code&gt; via &lt;code&gt;StackingCVRegressor(..., multi_output=True)&lt;/code&gt;. (&lt;a href="https://github.com/rasbt/mlxtend/pull/802"&gt;#802&lt;/a&gt; via &lt;a href="ChromaticIsobar"&gt;Marco Tiraboschi&lt;/a&gt;)&lt;/li&gt;
&lt;/ul&gt;
Changes
&lt;ul&gt;
&lt;li&gt;Updates unit tests for scikit-learn 0.24.1 compatibility. (&lt;a href="https://github.com/rasbt/mlxtend/pull/774"&gt;#774&lt;/a&gt;)&lt;/li&gt;
&lt;li&gt;&lt;code&gt;StackingRegressor&lt;/code&gt; now requires setting &lt;code&gt;StackingRegressor(..., multi_output=True)&lt;/code&gt; if the target is multi-dimensional; this allows for better input validation. (&lt;a href="https://github.com/rasbt/mlxtend/pull/802"&gt;#802&lt;/a&gt;)&lt;/li&gt;
&lt;li&gt;Removes deprecated &lt;code&gt;res&lt;/code&gt; argument from &lt;code&gt;plot_decision_regions&lt;/code&gt;. (&lt;a href="https://github.com/rasbt/mlxtend/pull/803"&gt;#803&lt;/a&gt;)&lt;/li&gt;
&lt;li&gt;Adds a &lt;code&gt;title_fontsize&lt;/code&gt; parameter to &lt;code&gt;plot_learning_curves&lt;/code&gt; for controlling the title font size; also the plot style is now the matplotlib default. (&lt;a href="https://github.com/rasbt/mlxtend/pull/818"&gt;#818&lt;/a&gt;)&lt;/li&gt;
&lt;li&gt;Internal change using &lt;code&gt;'c': 'none'&lt;/code&gt; instead of &lt;code&gt;'c': ''&lt;/code&gt; in &lt;code&gt;mlxtend.plotting.plot_decision_regions&lt;/code&gt;'s scatterplot highlights to stay compatible with Matplotlib 3.4 and newer. (&lt;a href="https://github.com/rasbt/mlxtend/pull/822"&gt;#822&lt;/a&gt;)&lt;/li&gt;
&lt;li&gt;Adds a &lt;code&gt;fontcolor_threshold&lt;/code&gt; parameter to the &lt;code&gt;mlxtend.plotting.plot_confusion_matrix&lt;/code&gt; function as an additional option for determining the font color cut-off manually. (&lt;a href="https://github.com/rasbt/mlxtend/pull/827"&gt;#827&lt;/a&gt;)&lt;/li&gt;
&lt;li&gt;The &lt;code&gt;frequent_patterns.association_rules&lt;/code&gt; now raises a &lt;code&gt;ValueError&lt;/code&gt; if an empty frequent itemset DataFrame is passed. (&lt;a href="https://github.com/rasbt/mlxtend/pull/843"&gt;#843&lt;/a&gt;)&lt;/li&gt;
&lt;li&gt;The .632 and .632+ bootstrap method implemented in the &lt;code&gt;mlxtend.evaluate.bootstrap_point632_score&lt;/code&gt; function now use the whole training set for the resubstitution weighting term instead of the internal training set that is a new bootstrap sample in each round. (&lt;a href="https://github.com/rasbt/mlxtend/pull/844"&gt;#844&lt;/a&gt;)&lt;/li&gt;
&lt;/ul&gt;
Bug Fixes
&lt;ul&gt;
&lt;li&gt;Fixes a typo in the SequentialFeatureSelector documentation (&lt;a href="https://github.com/rasbt/mlxtend/issues/835"&gt;#835&lt;/a&gt; via &lt;a href="https://github.com/joaozanlorensi"&gt;João Pedro Zanlorensi Cardoso&lt;/a&gt;)&lt;/li&gt;
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