auto save

1.py

+'''
+注：这个程序只能在cmd中通过当前目录下python test1.py来运行才能实时显示
+'''
+
+import numpy as np
+import matplotlib.pyplot as plt
+from matplotlib import animation
+
+# New figure with white background 
+fig = plt.figure(figsize=(6, 6), facecolor='white')
+
+# New axis over the whole figure, no frame and a 1:1 aspect ratio 
+ax = fig.add_axes([0, 0, 1, 1], frameon=False, aspect=1)
+
+# Number of ring 
+n = 50
+size_min = 50
+size_max = 50 ** 2
+
+# Ring position 
+pos = np.random.uniform(0, 1, (n, 2))
+
+# Ring colors 
+color = np.ones((n, 4)) * (0, 0, 0, 1)
+# Alpha color channel geos from 0(transparent) to 1(opaque) 
+color[:, 3] = np.linspace(0, 1, n)
+
+# Ring sizes 
+size = np.linspace(size_min, size_max, n)
+
+# Scatter plot 
+scat = ax.scatter(pos[:, 0], pos[:, 1], s=size, lw=0.5, edgecolors=color, facecolors='None')
+
+# Ensure limits are [0,1] and remove ticks 
+ax.set_xlim(0, 1), ax.set_xticks([])
+ax.set_ylim(0, 1), ax.set_yticks([])
+
+
+def update(frame):
+    global pos, color, size
+
+    # Every ring is made more transparnt
+    color[:, 3] = np.maximum(0, color[:, 3] - 1.0 / n)
+
+    # Each ring is made larger
+    size += (size_max - size_min) / n
+
+    # Reset specific ring
+    i = frame % 50
+    pos[i] = np.random.uniform(0, 1, 2)
+    size[i] = size_min
+    color[i, 3] = 1
+
+    # Update scatter object
+    scat.set_edgecolors(color)
+    scat.set_sizes(size)
+    scat.set_offsets(pos)
+
+    # Return the modified object
+    return scat,
+
+
+anim = animation.FuncAnimation(fig, update, interval=10, blit=True, frames=200)
+# plt.savefig('fig.png',bbox_inches='tight')
+# plt.subplot(111)
+plt.show()