matlabplot图例

在MATLAB中，可以使用legend函数来创建图例。图例是用来标注图形中不同颜色、线条的数据组的实际意义。使用legend函数的格式为：legend('string1','string2',...)，其中'string1'，'string2'表示要显示在图例中的文本。例如，下面的代码示例展示了如何创建带有图例的线图：

x = 0:0.02*pi:2*pi;
y1 = sin(x);
y2 = cos(x);
y3 = sin(3*x).*cos(x);
plot(x,[y1;y2;y3])
legend('sin(x)','cos(x)','sin(3x)cos(x)')

这段代码将在图形中绘制三条曲线，并在图例中显示相应的文本。图例函数legend('sin(x)','cos(x)','sin(3x)cos(x)')将在图形的右上角添加一个图例，分别标注sin(x)、cos(x)和sin(3x)cos(x)的曲线。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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