{ "cells": [ { "cell_type": "markdown", "id": "091fd0f4", "metadata": {}, "source": [ "# Querying a track with SQL-like commands\n", "\n", "\n", "With ``Tracklib`` it is really easy and convenient to \"query\" a track with SQL-like commands. The output take the type of a n-dimensional array, a new track or quite simply a float value.\n", "\n", "To query a track, you have to write a text command in a language which strongly similar at SQL, and call the function ``query`` by passing the text as argument.\n", "\n", "For example, the query below, create a new *track* with only observations whose speed is under 0.5 m/s:\n", "\n", "