The legend does not show the right marker:

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!

Answer 1

[Bjorn Gustavsson]

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;

HTH

[Jacob Assayag]

thank you very much!