Matplotlib.pyplot.hist()非常慢 [英] Matplotlib.pyplot.hist() very slow

问题描述

我要在一个阵列中绘制约10,000个项目.它们具有大约1,000个唯一值.

I'm plotting about 10,000 items in an array. They are of around 1,000 unique values.

现在，绘图已经进行了半个小时.我确保其余代码可以正常工作.

The plotting has been running half an hour now. I made sure rest of the code works.

那慢吗?这是我第一次用pyplot绘制直方图.

Is it that slow? This is my first time plotting histograms with pyplot.

推荐答案

要使用matplotlib快速绘制直方图，您需要将histtype='step'参数传递给pyplot.hist.例如:

To plot histograms using matplotlib quickly you need to pass the histtype='step' argument to pyplot.hist. For example:

plt.hist(np.random.exponential(size=1000000,bins=10000))
plt.show()

平移或缩放大约需要15秒钟，而更新大约需要5-10秒钟.

takes ~15 seconds to draw and roughly 5-10 seconds to update when you pan or zoom.

相反，用histtype='step'绘制:

plt.hist(np.random.exponential(size=1000000),bins=10000,histtype='step')
plt.show()

几乎立即进行绘图，可以立即进行平移和缩放.

plots almost immediately and can be panned and zoomed with no delay.

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