Matlab中图例的位置（图例放在图的上方、下方、左方、右方、图外面）等

• 编程语言

一、图例默认位置

默认的位置在NorthEast

r = 10;
a = 0;
b = 0;
t=0:0.1:2.1*pi;
x=a+r*cos(t);
y=b+r*sin(t);
A1=plot(x,y,'r','linewidth',4);%圆
hold on
axis equal
A2=plot([0 0],[1 10],'b','linewidth',4);%直线
legend([A1,A2],'圆形','line')

在这里插入图片描述

二、通过Location对legend的位置进行改变

变为North

r = 10;
a = 0;
b = 0;
t=0:0.1:2.1*pi;
x=a+r*cos(t);
y=b+r*sin(t);
A1=plot(x,y,'r','linewidth',4);%圆
hold on
axis equal
A2=plot([0 0],[1 10],'b','linewidth',4);%直线
legend([A1,A2],'圆形','line','Location','North')

在这里插入图片描述

三、图例放在图的其他位置

设置 位置
North inside plot box near top
South inside bottom
East inside right
West inside left
NorthEast inside top right (default for 2-D plots)
NorthWest inside top left
SouthEast inside bottom right
SouthWest’ inside bottom left
NorthOutside outside plot box near top
SouthOutside outside bottom
EastOutside outside right
WestOutside outside left
NorthEastOutside outside top right (default for 3-D plots)
NorthWestOutside outside top left
SouthEastOutside outside bottom right
SouthWestOutside outside bottom left
Best least conflict with data in plot
BestOutside least unused space outside plot

直接替换即可

在这里插入图片描述

四、图例放在图的外面

r = 10;
a = 0;
b = 0;
t=0:0.1:2.1*pi;
x=a+r*cos(t);
y=b+r*sin(t);
A1=plot(x,y,'r','linewidth',4);%圆
hold on
axis equal
A2=plot([0 0],[1 10],'b','linewidth',4);%直线
legend([A1,A2],'圆形','line','Location',' WestOutside')

在这里插入图片描述

五、只显示一个曲线

r = 10;
a = 0;
b = 0;
t=0:0.1:2.1*pi;
x=a+r*cos(t);
y=b+r*sin(t);
A1=plot(x,y,'r','linewidth',4);%圆
hold on
axis equal
A2=plot([0 0],[1 10],'b','linewidth',4);%直线
legend([A1],'圆形','Location',' WestOutside')

在这里插入图片描述

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