Add various horizontal lines to a plot Matlab 2016a

clear all; 
clc;
close all
x=[33.5 44 55 69 106 143 123 49 -25];
y=[61.8 53 45 73 77 81 156 68 -18];

z=[-7.5 -5 -2.5 -2.5 0 2.5 2.5 5 7.5];
zz=z(1:3:end)
for i=1:3
    zz_n(i)=zz(i)
end 
for i=1:3
hold on 
plot(x,z)
plot(x,zz_n(i)*ones(size(x)),':')
plot(y,z)
hold off 
end 

Hi all, I am using Matlab 2016a and trying to add various horizontal lines .. I aready added but I would like the lines to reach y-axis... any help.

Answer 1

[Ameer Hamza]

Sindar's answer works for R2018b and onward. For 2016a, you can use XLim as the x coordinates of line

clear all; 
clc;
close all
x=[33.5 44 55 69 106 143 123 49 -25];
y=[61.8 53 45 73 77 81 156 68 -18];

z=[-7.5 -5 -2.5 -2.5 0 2.5 2.5 5 7.5];
zz=z(1:3:end)
for i=1:3
    zz_n(i)=zz(i)
end
ax = axes();
hold on % just one hold on is enough
for i=1:3
plot(x,z)
plot(ax.XLim,zz_n(i)*ones(1,2),':')
plot(y,z)
end 

Answer 2

[Sindar]

See here for a few solutions:

https://www.mathworks.com/matlabcentral/answers/2031-adding-vertical-line-to-plot