The legend does not show the right marker:

Question

Jacob Assayag 2021-4-6

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/793782-the-legend-does-not-show-the-right-marker

评论： Jacob Assayag 2021-4-6

采纳的回答： Bjorn Gustavsson

在 MATLAB Online 中打开

Im trying to plot a graph with multiple plots on it and the legend is off:

i used :

orangeColor=[0.9290 0.6940 0.1250];
blueColor=[0 0.4470 0.7410];
scatter(XTestSet(:,2),YTestSet,[],orangeColor,'filled',"o");
scatter(XTrainSet(:,2),YTrainSet,[],blueColor,'o');
hold on;
polynum1(:,i)=PolyPredictorTest;
end 
for k=1:4:9
  plot(Xsorttestpoly,polynum1(:,k),"LineWidth",1.5);
end
legend('Train Data','Test Data','N=1','N=5','N=9')
hold off;

Thank you!

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Answer 1

Bjorn Gustavsson 2021-4-6

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/793782-the-legend-does-not-show-the-right-marker#answer_667987

在 MATLAB Online 中打开

When using legend it is always preferable to use an array of handles returned from the plotting functions. Try something like:

orangeColor=[0.9290 0.6940 0.1250];
blueColor=[0 0.4470 0.7410];
ph1 = scatter(XTestSet(:,2),YTestSet,[],orangeColor,'filled',"o");'
hold on
ph2 = scatter(XTrainSet(:,2),YTrainSet,[],blueColor,'o');
polynum1(:,i) = PolyPredictorTest;
end 
for k = 1:4:9
  ph3(1+(k-1)/4) = plot(Xsorttestpoly,polynum1(:,k),"LineWidth",1.5);
end
legend([ph1,ph2,ph3],'Train Data','Test Data','N=1','N=5','N=9')
hold off;