.. _sphx_glr_gallery_misc_contour_manual.py: ============== Manual Contour ============== Example of displaying your own contour lines and polygons using ContourSet. .. code-block:: python 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:: python 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:: python 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:: python plt.figure() # Filled contours using filled=True. cs = ContourSet(plt.gca(), [0, 1, 2], [filled01, filled12], filled=True, cmap=cm.bone) cbar = plt.colorbar(cs) # Contour lines (non-filled). lines = ContourSet(plt.gca(), [0, 1, 2], [lines0, lines1, lines2], cmap=cm.cool, linewidths=3) cbar.add_lines(lines) plt.axis([-0.5, 3.5, -0.5, 4.5]) plt.title('User-specified contours') .. image:: /gallery/misc/images/sphx_glr_contour_manual_001.png :align: center 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:: python plt.figure() 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(plt.gca(), [0, 1], [filled01], [kinds01], filled=True) cbar = plt.colorbar(cs) plt.axis([-0.5, 3.5, -0.5, 3.5]) plt.title('User specified filled contours with holes') plt.show() .. image:: /gallery/misc/images/sphx_glr_contour_manual_002.png :align: center **Total running time of the script:** ( 0 minutes 0.077 seconds) .. only :: html .. container:: sphx-glr-footer .. container:: sphx-glr-download :download:`Download Python source code: contour_manual.py ` .. container:: sphx-glr-download :download:`Download Jupyter notebook: contour_manual.ipynb ` .. only:: html .. rst-class:: sphx-glr-signature `Gallery generated by Sphinx-Gallery `_