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Using Cell Metadata to Select a ThumbnailΒΆ
If the nbsphinx-thumbnail cell tag is not enough, you can use cell metadata to specify more options.
The last cell in this notebook has this metadata:
{
"nbsphinx-thumbnail": {
"tooltip": "This tooltip message was defined in cell metadata"
}
}
If there are multiple outputs in the selected cell, the last one is used. See Choosing from Multiple Outputs for how to select a specific output.
[1]:
import matplotlib.pyplot as plt
import numpy as np
[2]:
plt.rcParams['image.cmap'] = 'coolwarm'
plt.rcParams['image.origin'] = 'lower'
Some example data stolen from https://matplotlib.org/examples/pylab_examples/pcolor_demo.html:
[3]:
x, y = np.meshgrid(np.arange(-3, 3, 0.1), np.arange(-2, 2, 0.1))
z = (1 - x / 2 + x ** 5 + y ** 3) * np.exp(-x ** 2 - y ** 2)
[4]:
zmax = np.max(np.abs(z))
[5]:
fig, ax = plt.subplots(figsize=[5, 3.5])
ax.imshow(z, vmin=-zmax, vmax=zmax)
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
Cell In[5], line 1
----> 1 fig, ax = plt.subplots(figsize=[5, 3.5])
2 ax.imshow(z, vmin=-zmax, vmax=zmax)
File /usr/lib/python3/dist-packages/matplotlib/pyplot.py:1450, in subplots(nrows, ncols, sharex, sharey, squeeze, width_ratios, height_ratios, subplot_kw, gridspec_kw, **fig_kw)
1304 def subplots(nrows=1, ncols=1, *, sharex=False, sharey=False, squeeze=True,
1305 width_ratios=None, height_ratios=None,
1306 subplot_kw=None, gridspec_kw=None, **fig_kw):
1307 """
1308 Create a figure and a set of subplots.
1309
(...)
1448
1449 """
-> 1450 fig = figure(**fig_kw)
1451 axs = fig.subplots(nrows=nrows, ncols=ncols, sharex=sharex, sharey=sharey,
1452 squeeze=squeeze, subplot_kw=subplot_kw,
1453 gridspec_kw=gridspec_kw, height_ratios=height_ratios,
1454 width_ratios=width_ratios)
1455 return fig, axs
File /usr/lib/python3/dist-packages/matplotlib/_api/deprecation.py:454, in make_keyword_only.<locals>.wrapper(*args, **kwargs)
448 if len(args) > name_idx:
449 warn_deprecated(
450 since, message="Passing the %(name)s %(obj_type)s "
451 "positionally is deprecated since Matplotlib %(since)s; the "
452 "parameter will become keyword-only %(removal)s.",
453 name=name, obj_type=f"parameter of {func.__name__}()")
--> 454 return func(*args, **kwargs)
File /usr/lib/python3/dist-packages/matplotlib/pyplot.py:783, in figure(num, figsize, dpi, facecolor, edgecolor, frameon, FigureClass, clear, **kwargs)
773 if len(allnums) == max_open_warning >= 1:
774 _api.warn_external(
775 f"More than {max_open_warning} figures have been opened. "
776 f"Figures created through the pyplot interface "
(...)
780 f"Consider using `matplotlib.pyplot.close()`.",
781 RuntimeWarning)
--> 783 manager = new_figure_manager(
784 num, figsize=figsize, dpi=dpi,
785 facecolor=facecolor, edgecolor=edgecolor, frameon=frameon,
786 FigureClass=FigureClass, **kwargs)
787 fig = manager.canvas.figure
788 if fig_label:
File /usr/lib/python3/dist-packages/matplotlib/pyplot.py:358, in new_figure_manager(*args, **kwargs)
356 def new_figure_manager(*args, **kwargs):
357 """Create a new figure manager instance."""
--> 358 _warn_if_gui_out_of_main_thread()
359 return _get_backend_mod().new_figure_manager(*args, **kwargs)
File /usr/lib/python3/dist-packages/matplotlib/pyplot.py:336, in _warn_if_gui_out_of_main_thread()
334 def _warn_if_gui_out_of_main_thread():
335 warn = False
--> 336 if _get_required_interactive_framework(_get_backend_mod()):
337 if hasattr(threading, 'get_native_id'):
338 # This compares native thread ids because even if Python-level
339 # Thread objects match, the underlying OS thread (which is what
340 # really matters) may be different on Python implementations with
341 # green threads.
342 if threading.get_native_id() != threading.main_thread().native_id:
File /usr/lib/python3/dist-packages/matplotlib/pyplot.py:207, in _get_backend_mod()
198 """
199 Ensure that a backend is selected and return it.
200
201 This is currently private, but may be made public in the future.
202 """
203 if _backend_mod is None:
204 # Use __getitem__ here to avoid going through the fallback logic (which
205 # will (re)import pyplot and then call switch_backend if we need to
206 # resolve the auto sentinel)
--> 207 switch_backend(dict.__getitem__(rcParams, "backend"))
208 return _backend_mod
File /usr/lib/python3/dist-packages/matplotlib/pyplot.py:265, in switch_backend(newbackend)
262 rcParamsOrig["backend"] = "agg"
263 return
--> 265 backend_mod = importlib.import_module(
266 cbook._backend_module_name(newbackend))
268 required_framework = _get_required_interactive_framework(backend_mod)
269 if required_framework is not None:
File /usr/lib/python3.12/importlib/__init__.py:90, in import_module(name, package)
88 break
89 level += 1
---> 90 return _bootstrap._gcd_import(name[level:], package, level)
File <frozen importlib._bootstrap>:1387, in _gcd_import(name, package, level)
File <frozen importlib._bootstrap>:1360, in _find_and_load(name, import_)
File <frozen importlib._bootstrap>:1310, in _find_and_load_unlocked(name, import_)
File <frozen importlib._bootstrap>:488, in _call_with_frames_removed(f, *args, **kwds)
File <frozen importlib._bootstrap>:1387, in _gcd_import(name, package, level)
File <frozen importlib._bootstrap>:1360, in _find_and_load(name, import_)
File <frozen importlib._bootstrap>:1331, in _find_and_load_unlocked(name, import_)
File <frozen importlib._bootstrap>:935, in _load_unlocked(spec)
File <frozen importlib._bootstrap_external>:995, in exec_module(self, module)
File <frozen importlib._bootstrap>:488, in _call_with_frames_removed(f, *args, **kwds)
File /usr/lib/python3/dist-packages/matplotlib_inline/__init__.py:1
----> 1 from . import backend_inline, config # noqa
3 __version__ = "0.2.1"
5 # we can't ''.join(...) otherwise finding the version number at build time requires
6 # import which introduces IPython and matplotlib at build time, and thus circular
7 # dependencies.
File /usr/lib/python3/dist-packages/matplotlib_inline/backend_inline.py:236
231 ip.events.unregister("post_run_cell", configure_once)
233 ip.events.register("post_run_cell", configure_once)
--> 236 _enable_matplotlib_integration()
239 def _fetch_figure_metadata(fig):
240 """Get some metadata to help with displaying a figure."""
File /usr/lib/python3/dist-packages/matplotlib_inline/backend_inline.py:218, in _enable_matplotlib_integration()
216 backend = matplotlib.get_backend(auto_select=False)
217 else:
--> 218 backend = matplotlib.rcParams._get("backend")
220 if ip and backend in ("inline", "module://matplotlib_inline.backend_inline"):
221 from IPython.core.pylabtools import activate_matplotlib
AttributeError: 'RcParams' object has no attribute '_get'