Plotting one value from a vector

I have a file where they give me a vector with multiple measurements (the vector is 100x500). I need to plot only one of thoes measurements onto the graph but my code is plotting all of them since i don't know how to plot one. How can I plot only one? Thank you for the help! This is my code:

(figure #2 is where im having the problem)

clear;
clc;

L=load("ver.mat");
t=linspace(0,500,numel(L.actual_ver));

Ensembl_avg=mean(L.ver);

figure(1);
plot(t,Ensembl_avg);
hold on;
plot(t,L.actual_ver);
grid on;
xlabel('Time');
ylabel('Ensemble Average and Actual Signal');
title('Ensemble Average and Actual Signal VS Time:');

figure(2);
plot(t,L.ver);
hold on;
plot(t,L.actual_ver);

[Image Analyst]

That's not a 1-D vector, it's a 2-D matrix. Which value from the matrix do you want to plot? Try something like

plot(L.ver(row, column), 'b.', 'MarkerSize', 50);

Answer 1

[Mathieu NOE]

hello

simply change this

figure(2);
plot(t,L.ver);

into :

figure(2);
channel = 50; % pick value between 1 and 100
plot(t,L.ver(channel,:));

also I wondered if there is a small but in your time vector t

we know that you have 500 samples but when you write :

t=linspace(0,500,numel(L.actual_ver));

this means you have a time vector that goes from 0 to 500 with 500 samples so time increment is (500-0) / (500 -1 ) = 1.002

I just thought that maybe the time increment was 1 so I opted for this way of creating the time vector

t=(0:numel(L.actual_ver)-1);

forget this if I'm wrong

all the best

full code :

L=load("ver.mat");
t=(0:numel(L.actual_ver)-1);
Ensembl_avg=mean(L.ver,1);
figure(1);
plot(t,Ensembl_avg);
hold on;
plot(t,L.actual_ver);
grid on;
xlabel('Time');
ylabel('Ensemble Average and Actual Signal');
title('Ensemble Average and Actual Signal VS Time:');

figure(2);
channel = 50; % pick value between 1 and 100
plot(t,L.ver(channel,:));
hold on;
plot(t,L.actual_ver);