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# How to plot multiple vertical lines at specific points on x axis?

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Heya :) on 10 Mar 2020
Commented: Heya :) on 11 Mar 2020
I want to plot 0.8 at 0, 0.1 at 0.9 and 0.06 at -1.3. Here is what I am trying but I am onling getting a single line.
close all; clear all; clc;
x = -1.5:0.1:1.5;
y = zeros(1,31);
p1=plot([-1.3 1.3],[0 0.06]);
p2=plot([0.9 0.9],[0 0.1]);
p3=plot([0 0],[0 0.8]);
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Heya :) on 11 Mar 2020
Thanks.

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### Accepted Answer

Ameer Hamza on 10 Mar 2020
Edited: Ameer Hamza on 10 Mar 2020
You need to hold the axes to retain all plots
clc;
x = -1.5:0.1:1.5;
y = zeros(1,31);
ax = axes();
hold(ax);
p1=plot([-1.3 -1.3],[0 0.06],'r');
p2=plot([0.9 0.9],[0 0.1],'r');
p3=plot([0 0],[0 0.8],'r');
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### More Answers (1)

Jakob B. Nielsen on 10 Mar 2020
By default, matlab replaces plots on an axes instead of adding. However, if you set hold on, it will add instead of replacing, like so:
close all; clear all; clc;
x = -1.5:0.1:1.5;
y = zeros(1,31);
p1=plot([-1.3 1.3],[0 0.06]);
hold on %the key!
p2=plot([0.9 0.9],[0 0.1]);
p3=plot([0 0],[0 0.8]);
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Heya :) on 10 Mar 2020
Thanks a lot.

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