更新在python

Question

使用matplotlib.figure情節數據我想更新我的2 d情節Y型數據，而不必調用「陰謀」每次

from matplotlib.figure import Figure 
fig = Figure(figsize=(12,8), dpi=100) 

for num in range(500): 
    if num == 0: 
    fig1 = fig.add_subplot(111) 
    fig1.plot(x_data, y_data) 
    fig1.set_title("Some Plot") 
    fig1.set_ylabel("Amplitude") 
    fig1.set_xlabel("Time") 

    else: 
    #fig1 clear y data 
    #Put here something like fig1.set_ydata(new_y_data), except that fig1 doesnt have set_ydata attribute` 

我可以明確和圖500倍，但會減慢循環。任何其他的選擇？

Answer 1

查看http://matplotlib.org/faq/usage_faq.html#parts-of-a-figure瞭解mpl圖的各個部分的描述。

如果您嘗試創建動畫，請參閱matplotlib.animation模塊，該模塊會爲您處理大部分細節。

您直接創建Figure對象，所以我假設你知道你在做什麼，在其他地方照顧畫布上創作的，但在本例中將使用pyplot界面創建數字/軸

import matplotlib.pyplot as plt 

# get the figure and axes objects, pyplot take care of the cavas creation 
fig, ax = plt.subplots(1, 1) # <- change this line to get your axes object differently 
# get a line artist, the comma matters 
ln, = ax.plot([], []) 
# set the axes labels 
ax.set_title('title') 
ax.set_xlabel('xlabel') 
ax.set_ylabel('ylabel') 

# loop over something that yields data 
for x, y in data_source_iterator: 
    # set the data on the line artist 
    ln.set_data(x, y) 
    # force the canvas to redraw 
    ax.figure.canvas.draw() # <- drop this line if something else manages re-drawing 
    # pause to make sure the gui has a chance to re-draw the screen 
    plt.pause(.1) # <-. drop this line to not pause your gui