Plot - add legend individually

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RuiQi 2017年7月13日

Commented: ROBIN KUMARon 18 Feb 2022

Accepted Answer: 亚当

How can I update the legend of each plot individually rather than at the end of the code ?

                         plot(x1, y1,'-vr','LineWidth', linewidth,“标记”, markersize);
                        
                         legend('Algorithm 1');
                        
                         plot(x2, y2,'-vr','LineWidth', linewidth,“标记”, markersize);
                        
                         legend('Algorithm 2');

The code above overwrites the legend for Algorithm 1

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ROBIN KUMAR on 18 Feb 2022

The same problem I have been facing with R2021a version. Please help me execute the same..

Accepted Answer

亚当 2017年7月13日

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//www.tatmou.com/matlabcentral/answers/348540-plot-add-legend-individually#answer_273997

Edited:亚当 2017年7月13日

If you are working with a fairly recent version of Matlab (> R2014b I think) then you can edit an existing legend if you keep the handle to it:

                             figure; hAxes = gca;
                            
                             plot(hAxes, x1, y1,'-vr','LineWidth', linewidth,“标记”, markersize);
                            
                             hLegend =传奇(hax,'stuff');
                            
                             hold( hAxes,'on')
                            
                             情节（haxes，x2，y2，'-vr','LineWidth', linewidth,“标记”, markersize);
                            
                             hLegend.String{2} ='other stuff';

It is more efficient to do all the plots first and then put the legend up for all of them though.

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ROBIN KUMAR on 18 Feb 2022

This doesn't work at all. The same problem I have been facing with R2021a version. Please help me execute the same..

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