Adding legend to plots created by for loops

l want to make a legend for my figure that was created by 3 for loops like mentioned below :

legend 1 : essential

legend 2 : less essential

legend 3 : most important

 for P=1:K
     % body 
     plot(.....,'bo');
 end

      for  Z=N:T
        %body
        plot(....,'ro'):
      end

 for  i=1:L
   %body
   plot(....,'ko'):
 end

how can l manage my legend ? thank you

Answer 1

[KL]

There are various ways. You can simply add the legend after you plot everything like,

 legend({'essential','less essential','most important'})

or

you can add it while plotting inside the loop like

 for P=1:K
     % body 
     plot(.....,'bo',,'DisplayName','essential');
 end

 %other loops

and finally,

 lgd = legend('show');

everything is explained here: https://www.mathworks.com/help/matlab/ref/legend.html

[mr mo]

Actually I am ploting my dataset by this function https://www.mathworks.com/matlabcentral/fileexchange/15161-plotcube and I don't know how to add legend to this function. Thanks a lot.