adding a legend in 3 for loops with three plots

l want to make a legend for my figure but l have 3 for loops with three plots 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

[Walter Roberson]

You appear to be creating K + (T-N+1) + L lineseries objects (at least). Which 3 of those lines do you want your legends to be attached to?

[mazari ahmed]

no just three lineseries for each : line 1 for loop 1 line 2 for loop 2 line 3 for loop 3

[mazari ahmed]

hope that my question is clear ?