使用python中的matplotlib 畫圖,show后關閉窗口,繼續運行命令
在用python中的matplotlib 畫圖時,show()函數總是要放在最后,且它阻止命令繼續往下運行,直到1.0.1版本才支持多個show()的使用。
想在顯示圖像后繼續運行相關的處理命令,或者顯示一副圖像后關閉它,再顯示第二幅圖像。如下辦法:
首先搜索到:
plt.close() will close current instance.
plt.close(2) will close figure 2
plt.close(plot1) will close figure with instance plot1
plt.close('all') will close all fiures
Found here.
Remember that plt.show() is a blocking function, so in the example code you used above,plt.close() isn't being executed until the window is closed, which makes it redundant.
You can use plt.ion() at the beginning of your code to make it non-blocking, although this has other implications.
搜索到:http://matplotlib.org/faq/usage_faq.html#what-is-interactive-mode
總結如下例子:
import matplotlib.pyplot as plt
import time
plt.ion() #開啟interactive mode
x = np.linspace(0, 50, 1000)
plt.figure(1) # 創建圖表1
plt.plot(x, np.sin(x))
plt.draw()
time.sleep(5)
plt.close(1)
plt.figure(2) # 創建圖表2
plt.plot(x, np.cos(x))
plt.draw()
time.sleep(5)
print 'it is ok'
如果不需要關閉圖表1,去掉plt.close(1),如果不需要redraw the current figure,那也可以去掉plt.draw()