Python 如何在 rcParams 中使用 linestyle=None 在 matplotlib 中制作误差条图？
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How do you make an errorbar plot in matplotlib using linestyle=None in rcParams?
提问by drs
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:
绘制误差条图时，matplotlib 不遵循 no linestyle 的 rcParams。相反，它绘制了所有与一条线相连的点。这是一个最低限度的工作示例：
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()
Is the only solution to explicitly set linestyle='None'when calling pyplot.errorbar()?
是linestyle='None'在调用时显式设置的唯一解决方案pyplot.errorbar()吗？
采纳答案by tacaswell
This is a "bug" in older versions of matplotlib(and has been fixedfor the 1.4 series). The issue is that in Axes.errorbarthere is a default value of '-'for fmt, which is then passed to the call to plotwhich is used to draw the markers and line. Because a format string is passed into plotin never looks at the default value in rcparams.
这是旧版本中的“错误” matplotlib（并且已为 1.4 系列修复）。问题是Axes.errorbar有一个默认值'-'for fmt，然后将其传递给plot用于绘制标记和线条的调用。因为传入的格式字符串plot从不查看rcparams.
You can also pass in fmt = ''
你也可以传入 fmt = ''
eb = plt.errorbar(x, y, yerr=.1, fmt='', color='b')
which will cause the rcParam['lines.linestlye']value to be respected. I have submitted a PRto implement this.
这将导致rcParam['lines.linestlye']价值得到尊重。我已经提交了一个PR来实现这个。
Another work around for this is to make the errorbar in two steps:
另一个解决方法是分两步制作错误栏：
l0, = plt.plot(x,y, marker='o', color='b')
eb = plt.errorbar(x, y, yerr=.1, fmt=None, color='b')
This is an annoying design decision, but changing it would be a major api break. Please open an issue on github about this.
这是一个烦人的设计决定，但改变它会是一个主要的 api 中断。请在 github 上打开一个关于此的问题。
errorbar doc.
错误栏文档。
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.
作为旁注，看起来调用签名上次更改是在 2007 年，这是为了使错误栏不默认为蓝色。
