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

2020 3 10
2 个回答
回答已采纳
更新时间：2020 3 11
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0 个投票

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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 采纳的回答

Ameer Hamza
Ameer Hamza 2020-3-10
编辑：Ameer Hamza 2020-3-10

0 个投票

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');

更多回答（1 个）

Jakob B. Nielsen
Jakob B. Nielsen 2020-3-10

0 个投票

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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