matplotlib.pyplot的plt.legend函数的简介
legend模块定义了legend类,负责绘制与轴和/或图形相关的图例。Legend类是一个图例句柄和图例文本的容器,该函数是用来给当前图像添加图例内容。大多数用户通常会通过图例函数创建图例。图例处理程序映射指定如何在轴或图形中从artists(线、补丁等)创建图例句柄。默认的图例处理程序定义在legend_handler模块中。虽然默认的图例处理程序并没有覆盖所有的artists类型,但是可以定义自定义图例处理程序来支持任意对象。
plt.legend(loc='best',frameon=False) #frameon参数,去掉图例边框
plt.legend(loc='best',edgecolor='blue') #edgecolor参数,设置图例边框颜色
plt.legend(loc='best',facecolor='blue') #facecolor参数,设置图例背景颜色,若无边框,参数无效
plt.legend(["CH", "US"], title='China VS Us') #设置图例标题
plt.legend([p1, p2], ["CH", "US"]) #设置图例名字及对应关系
原始文档:https://matplotlib.org/api/legend_api.html?highlight=legend#module-matplotlib.legend
1、参数解释
参数 解释 具体应用
loc
Location code string, or tuple (see below).图例所有figure位置
plt.legend(loc='upper center')
0: ‘best'
1: ‘upper right'
2: ‘upper left'
3: ‘lower left'
4: ‘lower right'
5: ‘right'
6: ‘center left'
7: ‘center right'
8: ‘lower center'
9: ‘upper center'
10: ‘center'
prop the font property字体参数
fontsize the font size (used only if prop is not specified)
fontsize : int or float or {‘xx-small’, ‘x-small’, ‘small’, ‘medium’, ‘large’, ‘x-large’, ‘xx-large’}
markerscale the relative size of legend markers vs. original
图例标记与原始标记的相对大小
markerfirst If True (default), marker is to left of the label.
如果为True,则图例标记位于图例标签的左侧
numpoints the number of points in the legend for line
为线条图图例条目创建的标记点数
scatterpoints the number of points in the legend for scatter plot
为散点图图例条目创建的标记点数
scatteryoffsets a list of yoffsets for scatter symbols in legend
为散点图图例条目创建的标记的垂直偏移量
frameon If True, draw the legend on a patch (frame).
控制是否应在图例周围绘制框架
fancybox If True, draw the frame with a round fancybox.
控制是否应在构成图例背景的FancyBboxPatch周围启用圆边
shadow If True, draw a shadow behind legend.
控制是否在图例后面画一个阴
framealpha Transparency of the frame.
控制图例框架的 Alpha 透明度
edgecolor Frame edgecolor.
facecolor Frame facecolor.
ncol number of columns 设置图例分为n列展示
borderpad the fractional whitespace inside the legend border
图例边框的内边距
labelspacing the vertical space between the legend entries
图例条目之间的垂直间距
handlelength the length of the legend handles
图例句柄的长度
handleheight the height of the legend handles
图例句柄的高度
handletextpad the pad between the legend handle and text
图例句柄和文本之间的间距
borderaxespad the pad between the axes and legend border
轴与图例边框之间的距离
columnspacing the spacing between columns 列间距
title the legend title
bbox_to_anchor the bbox that the legend will be anchored.指定图例在轴的位置
bbox_transform the transform for the bbox. transAxes if None.
2、源代码
更新……
def legend Found at: matplotlib.pyplot
@_copy_docstring_and_deprecators(Axes.legend)
def legend(*args, **kwargs):
return gca().legend(*args, **kwargs)
# Autogenerated by boilerplate.py. Do not edit as changes will be lost.
matplotlib.pyplot的plt.legend函数的使用方法
1、基础用法
plt.figure()
col_cou_len=len(Keys)
plt.pie(x=Values,labels=Keys,colors=cols[:col_cou_len], startangle=90,shadow=True,autopct='%1.3f%%')
plt.title(tit_name)
plt.legend()
plt.show()