matplotlib quiver箭图绘制

quiver绘制表示梯度变化很是有用，下面是学习过程当中给出的两个例子，能够很好理解quiver的用法web from pylab import * close() ## example 1 x = linspace(0,10,40) y = x**2*exp(-x) u = array([x[i+1]-x[i] for i in range(len(x)-1)]) v = array([

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