对于下面的简单图表,有没有办法让matplotlib填充图例,使其从左到右填充行,而不是第一列填充第二列?
>>> from pylab import *
>>> x = arange(-2*pi, 2*pi, 0.1)
>>> plot(x, sin(x), label='Sine')
>>> plot(x, cos(x), label='Cosine')
>>> plot(x, arctan(x), label='Inverse tan')
>>> legend(loc=9,ncol=2)
>>> grid('on')
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