{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "\n# SI prefixed offsets and natural order of magnitudes\n\n`matplotlib.ticker.EngFormatter` is capable of computing a natural\noffset for your axis data, and presenting it with a standard SI prefix\nautomatically calculated.\n\nBelow is an examples of such a plot:\n" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "import matplotlib.pyplot as plt\nimport numpy as np\n\nimport matplotlib.ticker as mticker\n\n# Fixing random state for reproducibility\nnp.random.seed(19680801)\n\nUNIT = \"Hz\"\n\nfig, ax = plt.subplots()\nax.yaxis.set_major_formatter(mticker.EngFormatter(\n useOffset=True,\n unit=UNIT\n))\nsize = 100\nmeasurement = np.full(size, 1e9)\nnoise = np.random.uniform(low=-2e3, high=2e3, size=size)\nax.plot(measurement + noise)\nplt.show()" ] } ], "metadata": { "kernelspec": { "display_name": "Python 3", "language": "python", "name": "python3" }, "language_info": { "codemirror_mode": { "name": "ipython", "version": 3 }, "file_extension": ".py", "mimetype": "text/x-python", "name": "python", "nbconvert_exporter": "python", "pygments_lexer": "ipython3", "version": "3.13.2" } }, "nbformat": 4, "nbformat_minor": 0 }