ENH: New options to the skewt plot to close out #699

act/plotting/skewtdisplay.py

@@ -240,8 +240,14 @@ def plot_from_u_and_v(
         shade_cin=True,
         set_title=None,
         smooth_p=3,
+        plot_dry_adiabats=False,
+        plot_moist_adiabats=False,
+        plot_mixing_lines=False,
         plot_barbs_kwargs=dict(),
         plot_kwargs=dict(),
+        dry_adiabats_kwargs=dict(),
+        moist_adiabats_kwargs=dict(),
+        mixing_lines_kwargs=dict(),
     ):
         """
         This function will plot a Skew-T from a sounding dataset. The wind
@@ -291,6 +297,12 @@ def plot_from_u_and_v(
         plot_kwargs : dict
             Additional keyword arguments to pass into MetPy's
             SkewT.plot.
+        dry_adiabats_kwargs : dict
+            Additional keyword arguments to pass into MetPy's plot_dry_adiabats function
+        moist_adiabats_kwargs : dict
+            Additional keyword arguments to pass into MetPy's plot_moist_adiabats function
+        mixing_lines_kwargs : dict
+            Additional keyword arguments to pass into MetPy's plot_mixing_lines function
 
         Returns
         -------
@@ -424,6 +436,25 @@ def plot_from_u_and_v(
         if shade_cin:
             self.SkewT[subplot_index].shade_cin(p, T, prof, linewidth=2)
 
+        # Get plot temperatures from x-axis as t0
+        t0 = self.SkewT[subplot_index].ax.get_xticks() * getattr(units, T_units)
+
+        # Add minimum pressure to pressure levels to plot
+        if np.nanmin(p.magnitude) < np.nanmin(p_levels_to_plot.magnitude):
+            plp = np.insert(p_levels_to_plot.magnitude, 0, np.nanmin(p.magnitude)) * units('hPa')
+        else:
+            plp = p_levels_to_plot
+
+        # New options for plotting dry and moist adiabats as well as the mixing lines
+        if plot_dry_adiabats:
+            self.SkewT[subplot_index].plot_dry_adiabats(pressure=plp, t0=t0, **dry_adiabats_kwargs)
+
+        if plot_moist_adiabats:
+            self.SkewT[subplot_index].plot_moist_adiabats(t0=t0, pressure=plp, **moist_adiabats_kwargs)
+
+        if plot_mixing_lines:
+            self.SkewT[subplot_index].plot_mixing_lines(pressure=plp, **mixing_lines_kwargs)
+
         # Set Title
         if set_title is None:
             if 'time' in self._ds[dsname]:
@@ -432,8 +463,7 @@ def plot_from_u_and_v(
                 title_time = self._ds[dsname].attrs['_file_dates'][0]
             else:
                 title_time = ''
-            title_list = [dsname, 'on', title_time]
-            set_title = ' '.join(' '.join(x) for x in title_list)
+            set_title = ' '.join([dsname, 'on', title_time[0]])
 
         self.axes[subplot_index].set_title(set_title)
 

act/tests/plotting/test_skewtdisplay.py

@@ -15,10 +15,7 @@ def test_skewt_plot():
     skewt = SkewTDisplay(sonde_ds)
     skewt.plot_from_u_and_v('u_wind', 'v_wind', 'pres', 'tdry', 'dp')
     sonde_ds.close()
-    try:
-        return skewt.fig
-    finally:
-        matplotlib.pyplot.close(skewt.fig)
+    return skewt.fig
 
 
 @pytest.mark.mpl_image_compare(tolerance=30)
@@ -27,10 +24,7 @@ def test_skewt_plot_spd_dir():
     skewt = SkewTDisplay(sonde_ds, ds_name='act_datastream')
     skewt.plot_from_spd_and_dir('wspd', 'deg', 'pres', 'tdry', 'dp')
     sonde_ds.close()
-    try:
-        return skewt.fig
-    finally:
-        matplotlib.pyplot.close(skewt.fig)
+    return skewt.fig
 
 
 @pytest.mark.mpl_image_compare(tolerance=81)
@@ -63,10 +57,7 @@ def test_multi_skewt_plot():
             j = 0
         elif j == 0:
             j += 1
-    try:
-        return skewt.fig
-    finally:
-        matplotlib.pyplot.close(skewt.fig)
+    return skewt.fig
 
 
 @pytest.mark.mpl_image_compare(tolerance=30)
@@ -94,3 +85,13 @@ def test_enhanced_skewt_plot_2():
     )
     ds.close()
     return display.fig
+
+
+@pytest.mark.mpl_image_compare(tolerance=30)
+def test_skewt_options():
+    sonde_ds = act.io.arm.read_arm_netcdf(sample_files.EXAMPLE_SONDE1)
+    skewt = SkewTDisplay(sonde_ds)
+    skewt.plot_from_u_and_v('u_wind', 'v_wind', 'pres', 'tdry', 'dp', plot_dry_adiabats=True,
+                            plot_moist_adiabats=True, plot_mixing_lines=True)
+    sonde_ds.close()
+    return skewt.fig

examples/plotting/plot_skewt.py

@@ -33,5 +33,11 @@
 
 # Add data
 skewt.plot_from_u_and_v('u_wind', 'v_wind', 'pres', 'tdry', 'dp')
-sonde_ds.close()
+
 plt.show()
+# One could also add options like adiabats and mixing lines
+skewt = act.plotting.SkewTDisplay(sonde_ds, figsize=(15, 10))
+skewt.plot_from_u_and_v('u_wind', 'v_wind', 'pres', 'tdry', 'dp', plot_dry_adiabats=True,
+                        plot_moist_adiabats=True, plot_mixing_lines=True)
+plt.show()
+sonde_ds.close()