Merge pull request #426 from dtcenter/bugfix_425_tcrmw_cross_section

issue # 425, make fixes to the contour plot for the Z value to remove…

docs/Users_Guide/tcrmw_cross_section.rst

@@ -10,6 +10,7 @@ from the METcalcpy vertical interpolation module, *vertical_interpolation.py*:
 
 https://metcalcpy.readthedocs.io/en/develop/Users_Guide/vertical_interpolation.html
 
+**NOTE**:Data must have the following **required fields**: **temperature**, **relative humidity**, and **surface pressure**.  These are required by the METcalcpy vertical_interpolation module to compute pressure indices.
 
 Example
 =======

metplotpy/contributed/tc_rmw/plot_cross_section.py

@@ -51,17 +51,25 @@ def plot_cross_section(config, data_set, args):
 
     field = data_set[config['field']]
     itime = config['index_time_slice']
-    field_azi_mean = np.mean(field, axis=1)[:, :, itime]
 
+    # originally, axis=1 but the order of dimensions was modified
+    # (Github issue:https://github.com/dtcenter/METcalcpy/issues/308)
+    field_azi_mean = np.mean(field, axis=0)[:, :, itime]
+
+
+    # originally, the transpose of the field_azi_mean was used, but this is no
+    # longer necessary.  If the transpose is used, the dimensions are incorrect
+    # and a TypeError will be raised by the contour plot.
     scalar_contour = ax.contour(data_set['range'],
                                 data_set[config['vertical_coord_name']],
-                                field_azi_mean.transpose(),
+                                field_azi_mean,
                                 levels=np.arange(config['contour_level_start'],
                                                  config['contour_level_end'],
                                                  config['contour_level_stepsize']),
                                                  colors=config['contour_line_colors'],
                                                  linewidths=(config['line_width'])
                                 )
+
     plt.title(config['plot_title'])
     ax.clabel(scalar_contour, colors=config['contour_label_color'], fmt=config['contour_label_fmt'])
     ax.set_xlabel(config['x_label'])