Python 通过 matplotlib 图例中的标记删除线

Remove line through marker in matplotlib legend

提问by jlconlin

I have a matplotlibplot generated with the following code:

我有一个matplotlib使用以下代码生成的图：

import matplotlib.pyplot as pyplot

Fig, ax = pyplot.subplots()
for i, (mark, color) in enumerate(zip(
    ['s', 'o', 'D', 'v'], ['r', 'g', 'b', 'purple'])):
    ax.plot(i+1, i+1, color=color,
            marker=mark,
            markerfacecolor='None',
            markeredgecolor=color,
            label=i)

ax.set_xlim(0,5)
ax.set_ylim(0,5)
ax.legend()

with this as the generated figure:

以此作为生成的图：

I don't like the lines through the markers in the legend. How can I get rid of them?

我不喜欢图例中通过标记的线条。我怎样才能摆脱它们？

采纳答案by tom10

You can specify linestyle="None"as a keyword argument in the plot command:

您可以linestyle="None"在 plot 命令中指定为关键字参数：

import matplotlib.pyplot as pyplot

Fig, ax = pyplot.subplots()
for i, (mark, color) in enumerate(zip(
    ['s', 'o', 'D', 'v'], ['r', 'g', 'b', 'purple'])):
    ax.plot(i+1, i+1, color=color,
            marker=mark,
            markerfacecolor='None',
            markeredgecolor=color,
            linestyle = 'None',
            label=`i`)

ax.set_xlim(0,5)
ax.set_ylim(0,5)
ax.legend(numpoints=1)
pyplot.show()

Since you're only plotting single points, you can't see the line attribute except for in the legend.

由于您只绘制单个点，因此除了图例之外，您看不到线属性。

回答by M4rtini

You should use a scatterplot here

你应该在这里使用散点图

import matplotlib.pyplot as pyplot

Fig, ax = pyplot.subplots()
for i, (mark, color) in enumerate(zip(
    ['s', 'o', 'D', 'v'], ['r', 'g', 'b', 'purple'])):
    ax.scatter(i+1, i+1, color=color,
            marker=mark,
            facecolors='none',
            label=i)

ax.set_xlim(0,5)
ax.set_ylim(0,5)
ax.legend(scatterpoints=1)

pyplot.show()

回答by Hooked

You can set the rcparamsfor the plots:

您可以rcparams为绘图设置：

import matplotlib
matplotlib.rcParams['legend.handlelength'] = 0
matplotlib.rcParams['legend.numpoints'] = 1

All the legend.* parameters are available as keywords if you don't want the setting to apply globally for all plots. See matplotlib.pyplot.legenddocumentation and this related question:

如果您不希望将设置全局应用于所有绘图，则所有图例.* 参数都可用作关键字。请参阅matplotlib.pyplot.legend文档和此相关问题：

legend setting (numpoints and scatterpoints) in matplotlib does not work

matplotlib 中的图例设置（数字点和散点）不起作用

回答by blalterman

To simply remove the lines once the data has been plotted:

在绘制数据后简单地删除线条：

handles, labels = ax.get_legend_handles_labels()
for h in handles: h.set_linestyle("")
ax.legend(handles, labels)