Add show and savefig method to raster_plot.py and fix pyplot.axes(ax) deprecation warning by replacing to pyplot.sca(ax). There is also a pandas deprecation warning regarding read_table, which was un-deprecated in pandas 0.25.0 (pandas-dev/pandas#27102)

Author: niltonlk

pynest/nest/raster_plot.py

@@ -30,7 +30,9 @@
     'from_device',
     'from_file',
     'from_file_numpy',
-    'from_file_pandas'
+    'from_file_pandas',
+    'show',
+    'savefig'
 ]
 
 
@@ -209,6 +211,18 @@ def from_device(detec, **kwargs):
             record_to is set to either 'ascii' or 'memory'.")
 
 
+def show(*args, **kwargs):
+    import matplotlib.pyplot as plt 
+
+    plt.show(*args, **kwargs)
+
+
+def savefig(*args, **kwargs):
+    import matplotlib.pyplot as plt 
+
+    plt.savefig(*args, **kwargs)
+
+
 def _from_memory(detec):
     ev = detec.get("events")
     return ev["times"], ev["senders"]
@@ -285,7 +299,7 @@ def _make_plot(ts, ts1, node_ids, neurons, hist=True, hist_binwidth=5.0,
         plt.ylabel("Rate (Hz)")
         plt.xlabel(xlabel)
         plt.xlim(xlim)
-        plt.axes(ax1)
+        plt.sca(ax1)
     else:
         plotid = plt.plot(ts1, node_ids, color_marker)
         plt.xlabel(xlabel)