qetch | allows users to freely sketch patterns

qetch is a JavaScript library. qetch has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Qetch is a tool that allows users to freely sketch patterns on a scale-less canvas to query time series data without specifying query length or amplitude. We study how humans sketch time series patterns --- humans preserve visually salient perceptual features but often non-uniformly scale and locally distort a pattern --- and we develop a novel matching algorithm that accounts for human sketching errors. Qetch enables the easy construction of complex and expressive queries with two key features: regular expressions over sketches and relative positioning of sketches to query multiple time-aligned series.