How to add legend for graph with multiple lines on it

Hey, so I'm wondering you I would add a legend to all the graphs, I would like to label each line on each graph and I'm not sure how to do that.

Thanks,

Ben.

h = input("Initial height (m): ");                  %Initial height
angle = input("Angle of elavation: ");                 %Degrees
v = input("Initial velocity (m/s): ");                       %M/S
g=-9.81;                                                     %M/S^2
angles = 0:10:180;
heights = 0:10:100;
velocity = 10:10:100;
figure
for a = angles
   [x_val,y_val] = Arc(g,h,a,v);
   plot(x_val,y_val);
   hold on;
end
xlabel 'x (m)'
ylabel 'y (m)'
title 'Angles 0-180'

figure
for hi = heights
    [x_val,y_val] = Arc(g,hi,angle,v);
    plot(x_val,y_val);
    hold on;
end
xlabel 'x (m)'
ylabel 'y (m)'
title 'Height 0-100 (m)'

figure
for vel = velocity
    [x_val,y_val] = Arc(g,h,angle,vel);
    plot(x_val,y_val);
    hold on;
end
xlabel 'x (m)'
ylabel 'y (m)'
title 'Velocity 10-100 (m/s)'
m = [x_val',y_val'];
max_val = max(max(m));
figure
plot(x_val,y_val);
hold on;
[~,idx] = max(y_val); 
plot(x_val(idx),y_val(idx),'r*')
text(x_val(idx),y_val(idx),'max','VerticalAlignment','Bottom','HorizontalAlignment','Left','FontSize',8)
axis([0 max_val*1.05 0 max_val*1.05]);
xlabel 'x (m)'
ylabel 'y (m)'
title 'Original Data'

function [x_val,y_val] = Arc(g,h,angle,v)
y = h;
t = 0;

x_val = [];
y_val = [];

while y >= 0
  y=.5*g*t.^2+v*sind(angle)*t+h;
  x=v*cosd(angle)*t;
  t = t + 0.01;
  x_val = [x_val,x];
  y_val = [y_val,y];
end
end

[dpb]

Simply call legend for each plot when you create it...

Answer 1

[Srivardhan Gadila]

Refer to the documentation of Add Legend to Graph & legend.