Adjust contour levels and colorbar ticks to adapt to updates in Matpl…

…otlib 3.6+ (#575)

* Fix minor ticks on NCL_animate_1.py colorbar and update a few comments

* adjust NCL_vector_1.py contour levels

* adjust NCL_mask_5.py contour levels

* adjust CB_Rain.py contour levels

* adjust CB_Height.py contour levels

* adjust CB_Temperature.py contour levels

* formatting

Gallery/Animations/NCL_animate_1.py

@@ -38,51 +38,55 @@
 # Create animation:
 
 fig = plt.figure(figsize=(10, 8))
+
 # Generate axes using Cartopy and draw coastlines
 ax = plt.axes(projection=ccrs.PlateCarree(central_longitude=150))
 ax.coastlines(linewidths=0.5)
 ax.set_extent([-180, 180, -90, 90], ccrs.PlateCarree())
 
-# Use geocat.viz.util convenience function to set axes limits & tick values
+# Use geocat-viz convenience function to set axes limits & tick values
 gv.set_axes_limits_and_ticks(ax,
                              xlim=(-180, 180),
                              ylim=(-90, 90),
                              xticks=np.linspace(-180, 180, 13),
                              yticks=np.linspace(-90, 90, 7))
 
-# Use geocat.viz.util convenience function to add minor and major tick lines
+# Use geocat-viz convenience function to add minor and major tick lines
 gv.add_major_minor_ticks(ax, labelsize=10)
 
-# Use geocat.viz.util convenience function to make latitude, longitude tick labels
+# Use geocat-viz convenience function to make latitude, longitude tick labels
 gv.add_lat_lon_ticklabels(ax)
 
-# create initial plot that establishes a colorbar
-tas[0, :, :].plot.contourf(ax=ax,
-                           transform=ccrs.PlateCarree(),
-                           vmin=195,
-                           vmax=328,
-                           levels=53,
-                           cmap="inferno",
-                           cbar_kwargs={
-                               "extendrect": True,
-                               "orientation": "horizontal",
-                               "ticks": np.arange(195, 332, 9),
-                               "label": "",
-                               "shrink": 0.90
-                           })
-
-
-# animate function for matplotlib FuncAnimation
+# Create initial plot
+cplot = tas[0, :, :].plot.contourf(ax=ax,
+                                   transform=ccrs.PlateCarree(),
+                                   vmin=195,
+                                   vmax=328,
+                                   levels=53,
+                                   cmap="inferno",
+                                   add_colorbar=False)
+
+# Create a colorbar
+cbar = fig.colorbar(cplot,
+                    extendrect=True,
+                    orientation="horizontal",
+                    ticks=np.arange(195, 332, 9),
+                    label="",
+                    shrink=0.90)
+
+# Remove minor ticks from colorbar that don't work well with other formatting
+cbar.ax.minorticks_off()
+
+
+# Animate function for matplotlib FuncAnimation
 def animate(i):
-    tas[i, :, :].plot.contourf(
-        ax=ax,
-        transform=ccrs.PlateCarree(),
-        vmin=195,
-        vmax=328,
-        levels=53,
-        cmap="inferno",
-        add_colorbar=False,
-    )
+    tas[i, :, :].plot.contourf(ax=ax,
+                               transform=ccrs.PlateCarree(),
+                               vmin=195,
+                               vmax=328,
+                               levels=53,
+                               cmap="inferno",
+                               add_colorbar=False)
 
     gv.set_titles_and_labels(
         ax,
@@ -92,8 +96,8 @@ def animate(i):
         ylabel="")
 
 
-# runs the animation initiated with the frame from init and progressed with the animate function
+# Run the animation initiated with the frame from init and progressed with the animate function
 anim = animation.FuncAnimation(fig, animate, frames=30, interval=200)
 
-# Uncomment this line to save the created animation
+# Uncomment this line to save the animation
 #anim.save('animate_1.gif', writer='pillow', fps=5)

Gallery/Colors/CB_Height.py

@@ -79,7 +79,7 @@ def Plot(color, row, col, pos, title):
     # Contourf-plot data
     hgt = t.plot.contourf(ax=ax1,
                           transform=projection,
-                          levels=40,
+                          levels=31,
                           vmin=100,
                           vmax=1600,
                           cmap=newcmp,

Gallery/Colors/CB_Rain.py

@@ -79,7 +79,7 @@ def Plot(color, row, col, pos, title):
     # Contourf-plot data
     pre = t.plot.contourf(ax=ax1,
                           transform=projection,
-                          levels=14,
+                          levels=13,
                           vmin=0,
                           vmax=240,
                           cmap=newcmp,

Gallery/Colors/CB_Temperature.py

@@ -81,7 +81,7 @@ def Plot(color, row, col, pos, title):
     # Contourf-plot data
     temp = t.plot.contourf(ax=ax1,
                            transform=projection,
-                           levels=40,
+                           levels=33,
                            vmin=0,
                            vmax=32,
                            cmap=newcmp,

Gallery/Masking/NCL_mask_5.py

@@ -90,7 +90,7 @@
                                transform=ccrs.PlateCarree(),
                                vmin=235,
                                vmax=315,
-                               levels=18,
+                               levels=17,
                                cmap='magma',
                                add_colorbar=False)
 
@@ -103,7 +103,7 @@
                     extendrect=True,
                     extendfrac='auto',
                     use_gridspec=False,
-                    ticks=np.arange(240, 315, 5))
+                    ticks=np.arange(235, 315, 5))
 
 cbar.ax.tick_params(labelsize=10)
 

Gallery/Vectors/NCL_vector_1.py

@@ -73,9 +73,9 @@
 sst_plot = sst.plot.contourf(
     ax=ax,
     transform=proj,
-    levels=50,
+    levels=51,
     vmin=24,
-    vmax=28.8,
+    vmax=29,
     cmap="magma",
     add_colorbar=False,
 )