使用python中的matplotlib 画图,show后关闭窗口,继续运行命令

使用python中的matplotlib 画图,show后关闭窗口,继续运行命令

 

在用python中的matplotlib 画图时,show()函数老是要放在最后,且它阻止命令继续往下运行,直到1.0.1版本才支持多个show()的使用。
想在显示图像后继续运行相关的处理命令,或者显示一副图像后关闭它,再显示第二幅图像。以下办法:

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

总结以下例子:
import matplotlib.pyplot as plt
import time
plt.ion() #开启interactive mode
x = np.linspace(0, 50, 1000)
plt.figure(1) # 建立图表1
plt.plot(x, np.sin(x))
plt.draw()
time.sleep(5)
plt.close(1)
plt.figure(2) # 建立图表2
plt.plot(x, np.cos(x))
plt.draw()
time.sleep(5)
print 'it is ok'

若是不须要关闭图表1,去掉plt.close(1),若是不须要redraw the current figure,那也能够去掉plt.draw()
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