how to add legend values automatically ?

how to add legend automatically : for exmaple this is my code . the question is how to write the legend without writting every time it manually ?

    clc;clear all;close all
t=linspace(0,7*pi,300);
for i= [ 2 3 4 5 ]

   plot(t,cos(t+0.1*pi*i));
   xticks(0:pi:7*pi)

xticklabels((""+(0:7))+"\pi")
hold on;
legend ('0.2*pi','0.3*pi','0.4*pi','0.5*pi')
    
    
    
end

Answer 1

[Star Strider]

Try this (considerably simplified version of your code):

t=linspace(0,7*pi,300);
i= [ 2 3 4 5 ];
plot(t,cos(pi*0.1*i(:)*t));
xticks(0:pi:7*pi)
xticklabels((""+(0:7))+"\pi")
legend (sprintfc('%.1f\\pi',i*0.1))

The sprintfc function is undocumented although quite useful. You can also use the compose function to do the same thing here.

[tomer polsky]

thank you for your help !!!

[Star Strider]

As always, my pleasure!