.. DO NOT EDIT. .. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY. .. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE: .. "gallery/subplots_axes_and_figures/axes_margins.py" .. LINE NUMBERS ARE GIVEN BELOW. .. only:: html .. meta:: :keywords: codex .. note:: :class: sphx-glr-download-link-note :ref:`Go to the end ` to download the full example code .. rst-class:: sphx-glr-example-title .. _sphx_glr_gallery_subplots_axes_and_figures_axes_margins.py: ====================================================== Controlling view limits using margins and sticky_edges ====================================================== The first figure in this example shows how to zoom in and out of a plot using `~.Axes.margins` instead of `~.Axes.set_xlim` and `~.Axes.set_ylim`. The second figure demonstrates the concept of edge "stickiness" introduced by certain methods and artists and how to effectively work around that. .. GENERATED FROM PYTHON SOURCE LINES 13-43 .. code-block:: Python import matplotlib.pyplot as plt import numpy as np from matplotlib.patches import Polygon def f(t): return np.exp(-t) * np.cos(2*np.pi*t) t1 = np.arange(0.0, 3.0, 0.01) ax1 = plt.subplot(212) ax1.margins(0.05) # Default margin is 0.05, value 0 means fit ax1.plot(t1, f(t1)) ax2 = plt.subplot(221) ax2.margins(2, 2) # Values >0.0 zoom out ax2.plot(t1, f(t1)) ax2.set_title('Zoomed out') ax3 = plt.subplot(222) ax3.margins(x=0, y=-0.25) # Values in (-0.5, 0.0) zooms in to center ax3.plot(t1, f(t1)) ax3.set_title('Zoomed in') plt.show() .. image-sg:: /gallery/subplots_axes_and_figures/images/sphx_glr_axes_margins_001.png :alt: Zoomed out, Zoomed in :srcset: /gallery/subplots_axes_and_figures/images/sphx_glr_axes_margins_001.png, /gallery/subplots_axes_and_figures/images/sphx_glr_axes_margins_001_2_00x.png 2.00x :class: sphx-glr-single-img .. GENERATED FROM PYTHON SOURCE LINES 44-52 On the "stickiness" of certain plotting methods """"""""""""""""""""""""""""""""""""""""""""""" Some plotting functions make the axis limits "sticky" or immune to the will of the `~.Axes.margins` methods. For instance, `~.Axes.imshow` and `~.Axes.pcolor` expect the user to want the limits to be tight around the pixels shown in the plot. If this behavior is not desired, you need to set `~.Axes.use_sticky_edges` to `False`. Consider the following example: .. GENERATED FROM PYTHON SOURCE LINES 53-78 .. code-block:: Python y, x = np.mgrid[:5, 1:6] poly_coords = [ (0.25, 2.75), (3.25, 2.75), (2.25, 0.75), (0.25, 0.75) ] fig, (ax1, ax2) = plt.subplots(ncols=2) # Here we set the stickiness of the axes object... # ax1 we'll leave as the default, which uses sticky edges # and we'll turn off stickiness for ax2 ax2.use_sticky_edges = False for ax, status in zip((ax1, ax2), ('Is', 'Is Not')): cells = ax.pcolor(x, y, x+y, cmap='inferno', shading='auto') # sticky ax.add_patch( Polygon(poly_coords, color='forestgreen', alpha=0.5) ) # not sticky ax.margins(x=0.1, y=0.05) ax.set_aspect('equal') ax.set_title(f'{status} Sticky') plt.show() .. image-sg:: /gallery/subplots_axes_and_figures/images/sphx_glr_axes_margins_002.png :alt: Is Sticky, Is Not Sticky :srcset: /gallery/subplots_axes_and_figures/images/sphx_glr_axes_margins_002.png, /gallery/subplots_axes_and_figures/images/sphx_glr_axes_margins_002_2_00x.png 2.00x :class: sphx-glr-single-img .. GENERATED FROM PYTHON SOURCE LINES 79-88 .. admonition:: References The use of the following functions, methods, classes and modules is shown in this example: - `matplotlib.axes.Axes.margins` / `matplotlib.pyplot.margins` - `matplotlib.axes.Axes.use_sticky_edges` - `matplotlib.axes.Axes.pcolor` / `matplotlib.pyplot.pcolor` - `matplotlib.patches.Polygon` .. _sphx_glr_download_gallery_subplots_axes_and_figures_axes_margins.py: .. only:: html .. container:: sphx-glr-footer sphx-glr-footer-example .. container:: sphx-glr-download sphx-glr-download-jupyter :download:`Download Jupyter notebook: axes_margins.ipynb ` .. container:: sphx-glr-download sphx-glr-download-python :download:`Download Python source code: axes_margins.py ` .. only:: html .. rst-class:: sphx-glr-signature `Gallery generated by Sphinx-Gallery `_