加图例 - MATLAB legend MathWorks 中国 (2024)

语法 说明 示例 在当前坐标区上添加图例 在特定坐标区上添加图例 在执行绘图命令的过程中指定图例标签 从图例中排除线条 列出列中的条目并指定图例位置 反转图例项的顺序 在分块图布局中显示共享图例 在图例中包含部分图形对象 创建包含 LaTeX 标记的图例 为图例添加标题 删除图例背景 指定图例字体大小和颜色 输入参数 label1,...,labelN — 标签（指定为单独的参量） 字符向量 | 字符串 labels — 标签（指定为数组） 字符向量元胞数组 | 字符串数组 | 分类数组 subset — 要包含在图例中的数据序列 图形对象向量 target — 图例的目标 Axes 对象 | PolarAxes 对象 | GeographicAxes 对象 | 独立可视化 lcn — 图例位置 'north' | 'south' | 'east' | 'west' | 'northeast' | ... ornt — 方向 'vertical' (默认) | 'horizontal' bkgd — 图例框显示 'boxon' (默认) | 'boxoff' vsbl — 图例可见性 'hide' | 'show' | 'toggle' 名称-值参数 NumColumns — 列数 1 (默认) | 正整数 输出参量 lgd — Legend 对象 Legend 对象 提示 算法 版本历史记录 R2023b: 堆叠条形图和区域图的图例顺序发生反转 R2022b: 删除线条或其他绘图对象时图例会更新 R2021a: 将空标签传递给 legend 函数会在图例中省略该条目 R2018b: 当属性存在时，legend 将参量解释为属性名称 R2017b: 在坐标区尚不存在时，使用 legend 将创建坐标区 R2017a: 添加或删除数据时，图例会自动更新 R2014b: 不建议返回多个输出 另请参阅 函数 属性 主题 MATLAB 命令 Americas Europe Asia Pacific

x = linspace(0,pi);y1 = cos(x);plot(x,y1)hold on y2 = cos(2*x);plot(x,y2)legend('cos(x)','cos(2x)')

y3 = cos(3*x);plot(x,y3,'DisplayName','cos(3x)')hold off

legend('off')

tiledlayout(2,1)y1 = rand(3);ax1 = nexttile; plot(y1)y2 = rand(5);ax2 = nexttile; plot(y2)legend(ax1,{'Line 1','Line 2','Line 3'})

x = linspace(0,pi);y1 = cos(x);plot(x,y1,'DisplayName','cos(x)')hold on y2 = cos(2*x);plot(x,y2,'DisplayName','cos(2x)')hold offlegend

x = 0:0.2:10;plot(x,sin(x),x,sin(x+1));hold onyline(0,'--')legend('sin(x)','sin(x+1)','')

x = linspace(0,pi);y1 = cos(x);plot(x,y1)hold ony2 = cos(2*x);plot(x,y2)y3 = cos(3*x);plot(x,y3)y4 = cos(4*x);plot(x,y4)hold offlegend({'cos(x)','cos(2x)','cos(3x)','cos(4x)'},... 'Location','northwest','NumColumns',2)

plot([4 5 6 7; 0 1 2 3])lgd = legend("First","Second","Third","Fourth");

lgd.Direction = "reverse";

t = tiledlayout('flow','TileSpacing','compact');nexttileplot(rand(5))nexttileplot(rand(5))nexttileplot(rand(5))

lgd = legend;lgd.Layout.Tile = 4;

nexttileplot(rand(5))lgd.Layout.Tile = 'east';

x = linspace(0,pi);y1 = cos(x);p1 = plot(x,y1);hold ony2 = cos(2*x);p2 = plot(x,y2);y3 = cos(3*x);p3 = plot(x,y3);hold offlegend([p1 p3],{'First','Third'})

x = 0:0.1:10;y = sin(x);dy = cos(x);plot(x,y,x,dy);legend('$sin(x)$','$\frac{d}{dx}sin(x)$','Interpreter','latex');

x = linspace(0,pi);y1 = cos(x);plot(x,y1)hold ony2 = cos(2*x);plot(x,y2)hold offlgd = legend('cos(x)','cos(2x)');title(lgd,'My Legend Title')

x = linspace(0,pi);y1 = cos(x);plot(x,y1)hold ony2 = cos(2*x);plot(x,y2)hold offlegend({'cos(x)','cos(2x)'},'Location','southwest')legend('boxoff')

rdm = rand(4);plot(rdm)lgd = legend({'Line 1','Line 2','Line 3','Line 4'},... 'FontSize',12,'TextColor','blue');

lgd.NumColumns = 2;

plot(rand(3))lgd = legend('line1','line2','line3');lgd.FontSize = 12;lgd.FontWeight = 'bold';

x = 0:0.2:10;plot(x,sin(x),x,sin(x+1));hold onyline(0,'--')legend('sin(x)','sin(x+1)','')

legend('sin(x)','sin(x+1)',' ')

x = 0:0.2:10;p = plot(x,sin(x),x,sin(x+1));hold online0 = yline(0,'--');legend([p(1) p(2) line0], {'sin(x)','sin(x+1)',''});

legend({'Label1','NumColumns','Label3','Label4'},'NumColumns',2)

legend('Label1','Label2','Label2')

lgd = legend;lgd.AutoUpdate = 'off';

[lgd,icons,plots,txt] = legend(__)

lgd = legend(__)