Plot horizontal line over existing plot (on same figure)

Hi all!

I have to plot a horizontal (threshold) line over a graph obtained by means of a for loop. my matlab version is 2014a.

This is the script:

for i=1:18

figure(1)

title('Max Temperature','fontsize',20)

xlabel('n° sensor','fontsize',15)

ylabel('Temperature [°]','fontsize',15)

plot(i,Max_Temp(1,i),'o')

hold on

grid on

end

How can I do? Thank you very much.

Answer 1

[Cameron]

You didn't specify what the y value of your graph needs to be, but you can take the information in this post and adjust it as needed. I also reconfigured some of your code a bit.

figure(1)
title('Max Temperature','fontsize',20)
xlabel('n° sensor','fontsize',15)
ylabel('Temperature [°]','fontsize',15)
hold on
grid on
for i=1:18
    plot(i,Max_Temp(1,i),'o')
end
x = 1:18;
y = ones(1,length(x))*200; %I just made up a value of 200. Put whatever your threshold is here.
plot(x,y,'-k')
hold off

[ANDREA]

thank you!! it works! ;)