.. only:: html .. note:: :class: sphx-glr-download-link-note Click :ref:`here ` to download the full example code .. rst-class:: sphx-glr-example-title .. _sphx_glr_gallery_misc_contour_manual.py: ============== Manual Contour ============== Example of displaying your own contour lines and polygons using ContourSet. .. code-block:: default import matplotlib.pyplot as plt from matplotlib.contour import ContourSet import matplotlib.cm as cm Contour lines for each level are a list/tuple of polygons. .. code-block:: default lines0 = [[[0, 0], [0, 4]]] lines1 = [[[2, 0], [1, 2], [1, 3]]] lines2 = [[[3, 0], [3, 2]], [[3, 3], [3, 4]]] # Note two lines. Filled contours between two levels are also a list/tuple of polygons. Points can be ordered clockwise or anticlockwise. .. code-block:: default filled01 = [[[0, 0], [0, 4], [1, 3], [1, 2], [2, 0]]] filled12 = [[[2, 0], [3, 0], [3, 2], [1, 3], [1, 2]], # Note two polygons. [[1, 4], [3, 4], [3, 3]]] .. code-block:: default fig, ax = plt.subplots() # Filled contours using filled=True. cs = ContourSet(ax, [0, 1, 2], [filled01, filled12], filled=True, cmap=cm.bone) cbar = fig.colorbar(cs) # Contour lines (non-filled). lines = ContourSet( ax, [0, 1, 2], [lines0, lines1, lines2], cmap=cm.cool, linewidths=3) cbar.add_lines(lines) ax.set(xlim=(-0.5, 3.5), ylim=(-0.5, 4.5), title='User-specified contours') .. image:: /gallery/misc/images/sphx_glr_contour_manual_001.png :alt: User-specified contours :class: sphx-glr-single-img .. rst-class:: sphx-glr-script-out Out: .. code-block:: none [(-0.5, 3.5), (-0.5, 4.5), Text(0.5, 1.0, 'User-specified contours')] Multiple filled contour lines can be specified in a single list of polygon vertices along with a list of vertex kinds (code types) as described in the Path class. This is particularly useful for polygons with holes. Here a code type of 1 is a MOVETO, and 2 is a LINETO. .. code-block:: default fig, ax = plt.subplots() filled01 = [[[0, 0], [3, 0], [3, 3], [0, 3], [1, 1], [1, 2], [2, 2], [2, 1]]] kinds01 = [[1, 2, 2, 2, 1, 2, 2, 2]] cs = ContourSet(ax, [0, 1], [filled01], [kinds01], filled=True) cbar = fig.colorbar(cs) ax.set(xlim=(-0.5, 3.5), ylim=(-0.5, 3.5), title='User specified filled contours with holes') plt.show() .. image:: /gallery/misc/images/sphx_glr_contour_manual_002.png :alt: User specified filled contours with holes :class: sphx-glr-single-img .. _sphx_glr_download_gallery_misc_contour_manual.py: .. only :: html .. container:: sphx-glr-footer :class: sphx-glr-footer-example .. container:: sphx-glr-download sphx-glr-download-python :download:`Download Python source code: contour_manual.py ` .. container:: sphx-glr-download sphx-glr-download-jupyter :download:`Download Jupyter notebook: contour_manual.ipynb ` .. only:: html .. rst-class:: sphx-glr-signature Keywords: matplotlib code example, codex, python plot, pyplot `Gallery generated by Sphinx-Gallery `_