Is there anyone knows how to remove a line just after it showed up? I dynamically generate a bunch of dots via this ax.plot([x,0],[y,0],[z,0],color='#817339',marker='.') #x,y,z being continously updated So, I'll get a lot of lines from (0, 0, 0) to (x, y, z) now the question is: How do I remove those outdated lines? Or the whole 3D graph would be kind of messy after a while--- so many lines on the screen. thanks! PS. As for removing axis, it's pretty easy, just ax.axis("off") --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 114.36.28.49 ※ 编辑: WalterbyJeff 来自: 114.36.28.49 (07/16 00:13) 我之前有试过这两个指令 del ax.lines[0] ax.lines.pop(0) 但是我发觉我产生线段的那条必须要打两次，才不会一开始根本不会显示出来 我猜原因是时间太短，马上生出来又马上给拿掉了，所以没显示 而且就算用打两次还有其他问题，打两次产生线段的指令 line = ax.plot([x,0],[y,0],[z,0],color='#0000A0',marker='.') line = ax.plot([x,0],[y,0],[z,0],color='#0000A0',marker='.') ax.lines.pop(0) 会让图形跑到愈後面没消掉的线愈多，就像滑鼠设定延迟有一堆残影游标一样 ※ 编辑: WalterbyJeff 来自: 114.36.40.153 (07/17 22:30) #我把原来计算出新的位置向量 n 的演算法简化 import matplotlib.pyplot as plt from mpl_toolkits.mplot3d import Axes3D import numpy as np from numpy import * from pylab import * import pylab class vec(object): def __init__(self, x, y, z): self.vec=(x, y, z) def unit(self, vec): dist=math.sqrt(vec[0]**2+vec[1]**2+vec[2]**2) u=(vec[0]/dist,vec[1]/dist,vec[2]/dist) return u def plotlines(x ,y ,z): line = ax.plot([x,0],[y,0],[z,0],color='#0000A0',marker='.') #生产"线"的指令 ax.lines.pop(0) #删除线的指令 #如果加上这条，3D影像的图还是会跑(背景的尺寸一直在变) 但是线看不到，如果生产线的指令加两条，就看得到，很美好的 跑一个删一个，但跑一小段时间之後，延迟没删掉的线就会愈来愈多 我甚至还很疯狂的把生产线的指令弄成k个，删除的弄成k-1个 这种显示一个删一个的状况就能拖久一点，但是最後还是... ax.set_xlabel('X-axis') ax.set_ylabel('Y-axis') ax.set_zlabel('Z-axis') #del ax.lines[0] #这条我先注解掉，状况也跟上面一样 matplotlib.pyplot.show() def drawdynamicplot(m,n,d_n): for i in range(0,m): #n=vector.rungekutta1(n, d_n) #d_n=vector.rungekutta2(n, d_n) x1 = sin(n[0] - .5*i) y1 = cos(n[1]+.1*i) z1 = sin(n[2] - i**3) n= (x1,y1,z1) n=vector.unit(n) print n if i%25 == 0: print "-----------------------------" plotlines(n[0],n[1],n[2]) fig = plt.figure() ax = fig.add_subplot(111, projection='3d') vector=vec(1,2,3) n=(1.0,1.0,1.0) d_n=(1.0,-1.0,0.0) ion() m=10000 xarray=[] yarray=[] zarray=[] drawdynamicplot(m,n, d_n) --- 先谢谢了~~ ※ 编辑: WalterbyJeff 来自: 114.36.40.153 (07/17 23:57)