@@ -194,11 +194,10 @@ def example_plot(ax, fontsize=12, nodec=False):
194194#############################################
195195# However, this will steal space from a subplot layout:
196196
197- fig ,axs = plt .subplots (2 ,2 ,constrained_layout = True )
198- for ax in axs .flatten ()[:- 1 ]:
199- ax .plot (np .arange (10 ))
200- axs [1 ,1 ].plot (np .arange (10 ),label = 'This is a plot' )
201- axs [1 ,1 ].legend (loc = 'center left' ,bbox_to_anchor = (0.8 ,0.5 ))
197+ fig ,axs = plt .subplots (1 ,2 ,figsize = (4 ,2 ),constrained_layout = True )
198+ axs [0 ].plot (np .arange (10 ))
199+ axs [1 ].plot (np .arange (10 ),label = 'This is a plot' )
200+ axs [1 ].legend (loc = 'center left' ,bbox_to_anchor = (0.8 ,0.5 ))
202201
203202#############################################
204203# In order for a legend or other artist to *not* steal space
@@ -207,30 +206,47 @@ def example_plot(ax, fontsize=12, nodec=False):
207206# cropped, but can be useful if the plot is subsequently called
208207# with ``fig.savefig('outname.png', bbox_inches='tight')``. Note,
209208# however, that the legend's ``get_in_layout`` status will have to be
210- # toggled again to make the saved file work:
209+ # toggled again to make the saved file work, and we must manually
210+ # trigger a draw if we want constrained_layout to adjust the size
211+ # of the axes before printing.
211212
212- fig ,axs = plt .subplots (2 ,2 ,constrained_layout = True )
213- for ax in axs . flatten ()[: - 1 ]:
214- ax .plot (np .arange (10 ))
215- axs [1 , 1 ].plot (np .arange (10 ),label = 'This is a plot' )
216- leg = axs [1 , 1 ].legend (loc = 'center left' ,bbox_to_anchor = (0.8 ,0.5 ))
213+ fig ,axs = plt .subplots (1 , 2 ,figsize = ( 4 , 2 ) ,constrained_layout = True )
214+
215+ axs [ 0 ] .plot (np .arange (10 ))
216+ axs [1 ].plot (np .arange (10 ),label = 'This is a plot' )
217+ leg = axs [1 ].legend (loc = 'center left' ,bbox_to_anchor = (0.8 ,0.5 ))
217218leg .set_in_layout (False )
218- wanttoprint = False
219- if wanttoprint :
220- leg .set_in_layout (True )
221- fig .do_constrained_layout (False )
222- fig .savefig ('outname.png' ,bbox_inches = 'tight' )
219+ # trigger a draw so that constrained_layout is executed once
220+ # before we turn it off when printing....
221+ fig .canvas .draw ()
222+ # we want the legend included in the bbox_inches='tight' calcs.
223+ leg .set_in_layout (True )
224+ # we don't want the layout to change at this point.
225+ fig .set_constrained_layout (False )
226+ fig .savefig ('CL01.png' ,bbox_inches = 'tight' ,dpi = 100 )
223227
224228#############################################
229+ # The saved file looks like:
230+ #
231+ # .. image:: /_static/constrained_layout/CL01.png
232+ # :align: center
233+ #
225234# A better way to get around this awkwardness is to simply
226- # use a legend for the figure:
227- fig ,axs = plt .subplots (2 ,2 ,constrained_layout = True )
228- for ax in axs .flatten ()[:- 1 ]:
229- ax .plot (np .arange (10 ))
230- lines = axs [1 ,1 ].plot (np .arange (10 ),label = 'This is a plot' )
235+ # use the legend method provided by `.Figure.legend`:
236+ fig ,axs = plt .subplots (1 ,2 ,figsize = (4 ,2 ),constrained_layout = True )
237+ axs [0 ].plot (np .arange (10 ))
238+ lines = axs [1 ].plot (np .arange (10 ),label = 'This is a plot' )
231239labels = [l .get_label ()for l in lines ]
232240leg = fig .legend (lines ,labels ,loc = 'center left' ,
233- bbox_to_anchor = (0.8 ,0.5 ),bbox_transform = axs [1 ,1 ].transAxes )
241+ bbox_to_anchor = (0.8 ,0.5 ),bbox_transform = axs [1 ].transAxes )
242+ fig .savefig ('CL02.png' ,bbox_inches = 'tight' ,dpi = 100 )
243+
244+ #############################################
245+ # The saved file looks like:
246+ #
247+ # .. image:: /_static/constrained_layout/CL02.png
248+ # :align: center
249+ #
234250
235251###############################################################################
236252# Padding and Spacing