如何在Matplotlib条形图后面绘制网格线 [英] How to draw grid lines behind matplotlib bar graph

问题描述

x = ['01-02', '02-02', '03-02', '04-02', '05-02']
y = [2, 2, 3, 7, 2]

fig, ax = plt.subplots(1, 1)
ax.bar(range(len(y)), y, width=0.3,align='center',color='skyblue')
plt.xticks(range(len(y)), x, size='small')
plt.savefig('/home/user/graphimages/foo2.png')
plt.close()

我想在条形图后面绘制(x和y的)网格线.

I want to draw grid lines (of x & y) behind the bar graph.

推荐答案

要添加网格，只需添加

ax.grid()

如果您希望网格位于条形图的后面，请添加

If you want the grid to be behind the bars then add

ax.grid(zorder=0)
ax.bar(range(len(y)), y, width=0.3, align='center', color='skyblue', zorder=3)

重要的是条形图的zorder大于网格.实验似乎zorder=3是实际上能提供所需效果的最低值.我不知道为什么zorder=1还不够.

The important part is that the zorder of the bars is greater than grid. Experimenting it seems zorder=3 is the lowest value that actually gives the desired effect. I have no idea why zorder=1 isn't sufficient.

编辑: 我注意到这个问题已经在此处使用了答案不同的方法，尽管它遭受一些链接腐烂.据我所知，这两种方法都产生相同的结果，但是安德鲁·库克的答案更为优雅.

EDIT: I have noticed this question has already been answered here using a different method although it suffers some link rot. Both methods yield the same result as far as I can see but andrew cooke's answer is more elegant.

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