{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "\n# Ellipse with orientation arrow demo\n\nThis demo shows how to draw an ellipse with\nan orientation arrow (clockwise or counterclockwise).\nCompare this to the :doc:`Ellipse collection example\n`.\n" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "import matplotlib.pyplot as plt\n\nfrom matplotlib.markers import MarkerStyle\nfrom matplotlib.patches import Ellipse\nfrom matplotlib.transforms import Affine2D\n\n# Create a figure and axis\nfig, ax = plt.subplots(subplot_kw={\"aspect\": \"equal\"})\n\nellipse = Ellipse(\n xy=(2, 4),\n width=30,\n height=20,\n angle=35,\n facecolor=\"none\",\n edgecolor=\"b\"\n)\nax.add_patch(ellipse)\n\n# Plot an arrow marker at the end point of minor axis\nvertices = ellipse.get_co_vertices()\nt = Affine2D().rotate_deg(ellipse.angle)\nax.plot(\n vertices[0][0],\n vertices[0][1],\n color=\"b\",\n marker=MarkerStyle(\">\", \"full\", t),\n markersize=10\n)\n# Note: To reverse the orientation arrow, switch the marker type from > to <.\n\nplt.show()" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ ".. admonition:: References\n\n The use of the following functions, methods, classes and modules is shown\n in this example:\n\n - `matplotlib.patches`\n - `matplotlib.patches.Ellipse`\n\n" ] } ], "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 }