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Fast n-dimensional filtering and grouping of records.
JavaScript Dart

Fix #129: updating groups after filterFunction.

A serious bug was introduced in version 1.3.8, causing groups on the
first dimension to be incorrectly calculated after a filterFunction was
called on another dimension.
latest commit c8766a212c
Jason Davies jasondavies authored

README.md

Crossfilter

Crossfilter is a JavaScript library for exploring large multivariate datasets in the browser. Crossfilter supports extremely fast (<30ms) interaction with coordinated views, even with datasets containing a million or more records; we built it to power analytics for Square Register, allowing merchants to slice and dice their payment history fluidly.

Since most interactions only involve a single dimension, and then only small adjustments are made to the filter values, incremental filtering and reducing is significantly faster than starting from scratch. Crossfilter uses sorted indexes (and a few bit-twiddling hacks) to make this possible, dramatically increasing the perfor­mance of live histograms and top-K lists. Crossfilter is available under the Apache License.

Want to learn more? See the wiki.

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