Fix deprecation warning of matplotlib's pyplot.hold()

Author: jussienko

Diff for: cython/heat-equation/heat_simple.py

@@ -32,7 +32,7 @@ def init_fields(filename):
     return field, field0
 
 def write_field(field, step):
-    plt.hold(False)
+    plt.gca().clear()
     plt.imshow(field)
     plt.axis('off')
     plt.savefig('heat_{0:03d}.png'.format(step))

Diff for: interface/c/solution/heat-cffi.py

@@ -39,7 +39,7 @@ def init_fields(filename):
     return field, field0
 
 def write_field(field, step):
-    plt.hold(False)
+    plt.gca().clear()
     plt.imshow(field)
     plt.axis('off')
     plt.savefig('heat_{0:03d}.png'.format(step))

Diff for: interface/c/solution/heat-cython.py

@@ -32,7 +32,7 @@ def init_fields(filename):
     return field, field0
 
 def write_field(field, step):
-    plt.hold(False)
+    plt.gca().clear()
     plt.imshow(field)
     plt.axis('off')
     plt.savefig('heat_{0:03d}.png'.format(step))

Diff for: mpi/heat-equation/skeleton.py

@@ -56,7 +56,7 @@ def init_fields(filename):
     return field, field0
 
 def write_field(field, step):
-    plt.hold(False)
+    plt.gca().clear()
     plt.imshow(field)
     plt.axis('off')
     plt.savefig('heat_{0:03d}.png'.format(step))

Diff for: mpi/heat-equation/solution/heat-p2p.py

@@ -61,7 +61,7 @@ def init_fields(filename):
     return field, field0
 
 def write_field(field, step):
-    plt.hold(False)
+    plt.gca().clear()
     plt.imshow(field)
     plt.axis('off')
     plt.savefig('heat_{0:03d}.png'.format(step))

Diff for: mpi/non-blocking/solution/heat.py

@@ -66,7 +66,7 @@ def init_fields(filename):
     return field, field0
 
 def write_field(field, step):
-    plt.hold(False)
+    plt.gca().clear()
     plt.imshow(field)
     plt.axis('off')
     plt.savefig('heat_{0:03d}.png'.format(step))

Diff for: numpy/heat-equation/skeleton.py

@@ -40,7 +40,6 @@ def evolve(u, u_previous, a, dt):
 plt.imshow(field)
 plt.axis('off')
 plt.savefig('heat_{0:03d}.png'.format(0))
-plt.hold(False)
 
 # TODO: Implement the main iteration loop and write the figure 
 # (to a new) file after each 'image_interval' iteration

Diff for: numpy/heat-equation/solution/heat-serial.py

@@ -46,7 +46,7 @@ def init_fields(filename):
     return field, field0
 
 def write_field(field, step):
-    plt.hold(False)
+    plt.gca().clear()
     plt.imshow(field)
     plt.axis('off')
     plt.savefig('heat_{0:03d}.png'.format(step))