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Python+Matplotlibでプロットアニメーションを作成する

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コード

```import numpy
import matplotlib.pyplot as plt
import matplotlib.animation as animation
import mpl_toolkits.mplot3d.axes3d as p3

def plot_3D_animation(X, Y, Z, n_frame=None,
xlim=None, ylim=None, zlim=None,
step=None, saveanime=None, show=True):
"""3D plotting animation"""
fig = plt.figure()
ax = p3.Axes3D(fig)

if step is None:
step = 1
X = X[range(0, len(X), step)]
Y = Y[range(0, len(Y), step)]
Z = Z[range(0, len(Z), step)]

data = [numpy.vstack((X, Y, Z))]

lines = [ax.plot(dat[0, 0:1], dat[1, 0:1],
dat[2, 0:1])[0] for dat in data]

# Setting the axes properties
if xlim is None:
ax.set_xlim3d([X.min(), X.max()])
elif len(xlim) == 2:
ax.set_xlim3d(xlim)
ax.set_xlabel('X')
if ylim is None:
ax.set_ylim3d([Y.min(), Y.max()])
elif len(ylim) == 2:
ax.set_ylim3d(ylim)
ax.set_ylabel('Y')
if zlim is None:
ax.set_zlim3d([Z.min(), Z.max()])
elif len(zlim) == 2:
ax.set_zlim3d(zlim)
ax.set_zlabel('Z')
ax.set_title('3D animation')
ax.view_init(-10, 30)

def update_lines(num, dataLines, lines):
for line, data in zip(lines, dataLines):
line.set_data(data[0:2, :num])
line.set_3d_properties(data[2,:num])
return lines

if n_frame is None:
n_frame = len(X)

# Creating the Animation object
anim = animation.FuncAnimation(fig,
update_lines,
n_frame,
fargs=(data, lines),
interval=1,
blit=False)

if type(saveanime) == str:
writer = animation.FFMpegWriter()
anim.save(saveanime, writer=writer)

if show is True:
plt.show()

plt.clf()
plt.close()
```

使い方

```>>> import numpy as np
>>> X, Y, Z = np.array([1,2,3]), np.array([2,3,4]), np.array([4,5,6])
>>> plot_3D_animation(X, Y, Z)
```

使用例

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