如何在 rcParams 中使用 linestyle=None 在 matplotlib 中制作误差条图? [英] How do you make an errorbar plot in matplotlib using linestyle=None in rcParams?

问题描述

在绘制误差条图时，matplotlib 没有遵循 no linestyle 的 rcParams.而是绘制与一条线连接的所有点.这是一个最低限度的工作示例:

When plotting errorbar plots, matplotlib is not following the rcParams of no linestyle. Instead, it's plotting all of the points connected with a line. Here's a minimum working example:

import matplotlib.pyplot as plt

lines = {'linestyle': 'None'}
plt.rc('lines', **lines)

plt.errorbar((0, 1), (1, 0), yerr=(0.1, 0.1), marker='o')

plt.savefig('test.pdf')
plt.delaxes()

是否是在调用 pyplot.errorbar() 时显式设置 linestyle='None' 的唯一解决方案?

Is the only solution to explicitly set linestyle='None' when calling pyplot.errorbar()?

推荐答案

这是 matplotlib 的较旧版本中的错误"(并且已

This is a "bug" in older versions of matplotlib (and has been fixed for the 1.4 series). The issue is that in Axes.errorbar there is a default value of '-' for fmt, which is then passed to the call to plot which is used to draw the markers and line. Because a format string is passed into plot in never looks at the default value in rcparams.

你也可以传入fmt = ''

eb = plt.errorbar(x, y, yerr=.1, fmt='', color='b')

这将导致遵守 rcParam ['lines.linestlye'] 值.我已经提交了一个PR来实现这个.

which will cause the rcParam['lines.linestlye'] value to be respected. I have submitted a PRto implement this.

另一种解决方法是分两步制作误差条:

Another work around for this is to make the errorbar in two steps:

l0, = plt.plot(x,y, marker='o', color='b')
eb = plt.errorbar(x, y, yerr=.1, fmt=None, color='b')

这是一个烦人的设计决定，但改变它会是一个重大的 API 中断.请在 github 上打开一个关于此的问题.

This is an annoying design decision, but changing it would be a major api break. Please open an issue on github about this.

errorbar 文档.

errorbar doc.

作为旁注，呼叫签名似乎在2007年进行了最后一次更改，这是为了使错误栏不默认为蓝色.

As a side note, it looks like the call signature was last changed in 2007, and that was to make errorbars not default to blue.

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