Add images in example_StiffnessTensor.rst

docs/source/example_StiffnessTensor.rst

@@ -90,15 +90,24 @@ In order to fully evidence the directional dependence of the Young moduli, we ca
 
     >>> E.plot3D() # doctest: +SKIP
 
+    .. image:: ../_static/images/E_plot3D.png
+        :width: 400
+
 It is advised to use interactive plot to be able to zoom/rotate the surface. For flat images (i.e. to put in
 document/articles), we can use plot the values as a Pole Figure (PF):
 
     >>> E.plot_as_pole_figure() # doctest: +SKIP
 
+    .. image:: ../_static/images/E_PF.png
+        :width: 400
+
 Alternatively, we can plot the Young moduli on X-Y, X-Z and Y-Z sections only:
 
     >>> E.plot_xyz_sections() # doctest: +SKIP
 
+    .. image:: ../_static/images/E_xyz_sections.png
+        :width: 600
+
 Hyperspherical functions
 ~~~~~~~~~~~~~~~~~~~~~~~~
 Hyperspherical functions cannot plotted as 3D surfaces, as their values depend on two orthogonal directions.
@@ -107,12 +116,21 @@ plotting:
 
     >>> G.plot3D() # doctest: +SKIP
 
+    .. image:: ../_static/images/G_plot3D.png
+        :width: 400
+
 Instead of the mean value, we can consider other statistics, e.g.:
 
     >>> G.plot3D(which='min')   # doctest: +SKIP
 
+    .. image:: ../_static/images/G_plot3D_min.png
+        :width: 400
+
 This also works for ``max`` and ``std``. These parameters also apply for pole figures (see above).
 
 When plotting the X-Y, X-Z and Y-Z sections, the min, max and mean values are plotted at once:
 
-    >>> G.plot_xyz_sections() # doctest: +SKIP
+    >>> G.plot_xyz_sections() # doctest: +SKIP
+
+    .. image:: ../_static/images/G_xyz_sections.png
+        :width: 600