To make a legend for all artists on an Axes, call this function with an iterable of strings, one for each legend item. For example: A list of Artists (lines, patches) to be added to the legend. Use this together with labels, if you need full control on what is shown in the legend and the automatic mechanism described above is not sufficient.

（1）采用 plt.legend ( )默认参数. 第一步：给 plt.plot ( )中参数label=''传入字符串类型的值，也就是图例的名称. 第二步：使用plt.legend( )使上述代码产生效果. 直接上代码上图

You can do this either by using the label= keyword in each of your plt.plot() calls or by assigning your labels as a tuple or list within legend, as in this working example: import numpy as np import matplotlib.pyplot as plt x = np.linspace(-0.75,1,100) y0 = np.exp(2 + 3*x - 7*x**3) y1 = 7-4*np.sin(4*x) plt.plot(x,y0,x,y1) plt.gca().legend(('y0 ...

2024年8月1日 · Matplotlib.pyplot.legend() function is a utility given in the Matplotlib library for Python that gives a way to label and differentiate between multiple plots in the same figure. The attribute Loc in legend() is used to specify the location of the legend. The default value of loc is loc= “best” (upper left).

Matplotlib是Python中最流行的数据可视化库之一，而图例（Legend）是数据可视化中不可或缺的组成部分。 本文将全面介绍Matplotlib中图例的使用，从基础创建到高级自定义，帮助您掌握如何在图表中有效地使用图例来增强数据的可读性和解释性。 1. 图例的基本概念. 图例是图表中用于解释各个数据系列含义的元素。 它通常包含一个小样本（如线条、标记或颜色块）和相应的描述文本。 在Matplotlib中，我们可以使用 legend() 方法来添加图例。 让我们从一个简单的例子开始： …

To create a scatter plot with a legend one may use a loop and create one scatter plot per item to appear in the legend and set the label accordingly. The following also demonstrates how transparency of the markers can be adjusted by giving alpha a value between 0 and 1.

I would like to put legends inside each one of the subplots below. I've tried with plt.legend but it didn't work. f, (ax1, ax2, ax3) = plt.subplots(3, sharex=True, sharey=True) ax1.plot(xtr, color=...

How to configure and style the legend in Plotly with Python. New to Plotly? Traces of most types and shapes can be optionally associated with a single legend item in the legend. Whether or not a given trace or shape appears in the legend is controlled via the showlegend attribute.

There are many ways to create and customize legends in Matplotlib. Below we'll show a few examples for how to do so. First we'll show off how to make a legend for specific lines.

2021年12月16日 · This tutorial explains how to create and customize a plot legend in pandas, including several examples.