@@ -200,11 +200,10 @@ def example_plot(ax, fontsize=12, nodec=False):
200200#############################################
201201# However, this will steal space from a subplot layout:
202202
203- fig ,axs = plt .subplots (2 ,2 ,constrained_layout = True )
204- for ax in axs .flatten ()[:- 1 ]:
205- ax .plot (np .arange (10 ))
206- axs [1 ,1 ].plot (np .arange (10 ),label = 'This is a plot' )
207- axs [1 ,1 ].legend (loc = 'center left' ,bbox_to_anchor = (0.8 ,0.5 ))
203+ fig ,axs = plt .subplots (1 ,2 ,figsize = (4 ,2 ),constrained_layout = True )
204+ axs [0 ].plot (np .arange (10 ))
205+ axs [1 ].plot (np .arange (10 ),label = 'This is a plot' )
206+ axs [1 ].legend (loc = 'center left' ,bbox_to_anchor = (0.8 ,0.5 ))
208207
209208#############################################
210209# In order for a legend or other artist to *not* steal space
@@ -213,30 +212,47 @@ def example_plot(ax, fontsize=12, nodec=False):
213212# cropped, but can be useful if the plot is subsequently called
214213# with ``fig.savefig('outname.png', bbox_inches='tight')``. Note,
215214# however, that the legend's ``get_in_layout`` status will have to be
216- # toggled again to make the saved file work:
215+ # toggled again to make the saved file work, and we must manually
216+ # trigger a draw if we want constrained_layout to adjust the size
217+ # of the axes before printing.
217218
218- fig ,axs = plt .subplots (2 ,2 ,constrained_layout = True )
219- for ax in axs . flatten ()[: - 1 ]:
220- ax .plot (np .arange (10 ))
221- axs [1 , 1 ].plot (np .arange (10 ),label = 'This is a plot' )
222- leg = axs [1 , 1 ].legend (loc = 'center left' ,bbox_to_anchor = (0.8 ,0.5 ))
219+ fig ,axs = plt .subplots (1 , 2 ,figsize = ( 4 , 2 ) ,constrained_layout = True )
220+
221+ axs [ 0 ] .plot (np .arange (10 ))
222+ axs [1 ].plot (np .arange (10 ),label = 'This is a plot' )
223+ leg = axs [1 ].legend (loc = 'center left' ,bbox_to_anchor = (0.8 ,0.5 ))
223224leg .set_in_layout (False )
224- wanttoprint = False
225- if wanttoprint :
226- leg .set_in_layout (True )
227- fig .do_constrained_layout (False )
228- fig .savefig ('outname.png' ,bbox_inches = 'tight' )
225+ # trigger a draw so that constrained_layout is executed once
226+ # before we turn it off when printing....
227+ fig .canvas .draw ()
228+ # we want the legend included in the bbox_inches='tight' calcs.
229+ leg .set_in_layout (True )
230+ # we don't want the layout to change at this point.
231+ fig .set_constrained_layout (False )
232+ fig .savefig ('CL01.png' ,bbox_inches = 'tight' ,dpi = 100 )
229233
230234#############################################
235+ # The saved file looks like:
236+ #
237+ # .. image:: /_static/constrained_layout/CL01.png
238+ # :align: center
239+ #
231240# A better way to get around this awkwardness is to simply
232- # use a legend for the figure:
233- fig ,axs = plt .subplots (2 ,2 ,constrained_layout = True )
234- for ax in axs .flatten ()[:- 1 ]:
235- ax .plot (np .arange (10 ))
236- lines = axs [1 ,1 ].plot (np .arange (10 ),label = 'This is a plot' )
241+ # use the legend method provided by `.Figure.legend`:
242+ fig ,axs = plt .subplots (1 ,2 ,figsize = (4 ,2 ),constrained_layout = True )
243+ axs [0 ].plot (np .arange (10 ))
244+ lines = axs [1 ].plot (np .arange (10 ),label = 'This is a plot' )
237245labels = [l .get_label ()for l in lines ]
238246leg = fig .legend (lines ,labels ,loc = 'center left' ,
239- bbox_to_anchor = (0.8 ,0.5 ),bbox_transform = axs [1 ,1 ].transAxes )
247+ bbox_to_anchor = (0.8 ,0.5 ),bbox_transform = axs [1 ].transAxes )
248+ fig .savefig ('CL02.png' ,bbox_inches = 'tight' ,dpi = 100 )
249+
250+ #############################################
251+ # The saved file looks like:
252+ #
253+ # .. image:: /_static/constrained_layout/CL02.png
254+ # :align: center
255+ #
240256
241257###############################################################################
242258# Padding and Spacing