标签:att ima tle code otl 迭代器 port pac nts
from matplotlib import pyplot as plt import matplotlib.animation as animation import numpy as np def update_point(num): fig_points.set_data(data[:, 0:num]) return fig_points, fig1 = plt.figure() num_point = 50 data = np.random.rand(2, num_point) fig_points, = plt.plot([], [], ‘ro‘) plt.xlim(0, 1) plt.ylim(0, 1) plt.xlabel(‘x‘) plt.title(‘Scatter Point‘) # interval # repeat # frames # fargs # init_func anim = animation.FuncAnimation(fig1, update_point,num_point) #anim = animation.FuncAnimation(fig1, update_point,frames=num_point, interval=50, blit=False, repeat=False) plt.show()
这种方式每经过interval的时间后会调用函数(传入当前帧号)绘制一幅新图更新原图:
Init()是我们的动画在在创建动画基础框架(base frame)时调用的函数。这里我们们用一个非常简单的对line什么都不做的函数。这个函数一定要返回line对象,这个很重要,因为这样就能告诉动画之后要更新的内容,也就是动作的内容是line。--来自( http://mytrix.me/2013/08/matplotlib-animation-tutorial/ )
在这个动画函数中修改你的图
绘制正弦波函数:
可以使用多个线对象来同时更新多个子图于同一个动画生成器之中,不过这需要上面1~3步同时支持(就是写出来)多个线对象
import numpy as np from matplotlib import pyplot as plt from matplotlib import animation # 1.First set up the figure, the axis, and the plot element we want to animate fig = plt.figure() ax = plt.axes(xlim=(0,2),ylim=(-2,2)) line, = ax.plot([],[],lw=2) # 2.initialization function: plot the background of each frame def init(): line.set_data([],[]) return line, # 3.animation function. This is called sequentially # note: i is framenumber def update(i): x = np.linspace(0,2,1000) y = np.sin(2 * np.pi * (x - 0.01 * i)) # 调整x相当于向右平移图像 line.set_data(x,y) return line, # call the animator. blit=True means only re-draw the parts that have changed. # 画布, 使用帧数做参数的绘制函数, init生成器.。
anim = animation.FuncAnimation(fig,update,init_func=init,frames=200,interval=20,blit=False) # frames=200 帧数 # interval=20 间隔 # anim.save(‘anim3.mp4‘, fps=30, extra_args=[‘-vcodec‘, ‘libx264‘]) # 保存为mp4 # anim.save(‘anim3.gif‘, writer=‘imagemagick‘) # 保存为gif plt.show()
绘制衰减波
import numpy as np import matplotlib.pyplot as plt import matplotlib.animation as animation def data_gen(): t = 0 cnt = 0 while cnt < 200: cnt += 1 t += 0.1 yield t,np.sin(2 * np.pi * t) * np.exp(-t / 10.) def init(): ax.set_ylim(-1.1,1.1) ax.set_xlim(0,10) line.set_data([],[]) return line, def update(datag): # update the data t,y = datag xdata.append(t) ydata.append(y) line.set_data(xdata,ydata) if max(xdata) > 10: ax.set_xlim(max(xdata) - 10,max(xdata)) return line, fig,ax = plt.subplots() line, = ax.plot([],[],lw=2) ax.grid() xdata,ydata = [],[] ani = animation.FuncAnimation(fig,update,data_gen,interval=10,repeat=False,init_func=init) plt.show()
『python』科学计算专项_科学绘图库matplotlib学习之绘制动画(待续)
标签:att ima tle code otl 迭代器 port pac nts
原文地址:http://www.cnblogs.com/hellcat/p/7086850.html