add variable to legend matlab code example

Example 1: add variable to legend matlab

str = {strcat('z = ' , num2str(z))}  % at the end of first loop, z being loop output
str = [str , strcat('z = ' , num2str(z))] % after 2nd loop
% plot your data
legend(str{:})

Example 2: add manual legend matlab

h1=plot([1:10],'Color','r','DisplayName','This one');hold on;
h2=plot([1:2:10],'Color','b','DisplayName','This two');
h3=plot([1:3:10],'Color','k','DisplayName','This three');
legend([h1 h3],{'Legend 1','Legend 3'})