how to plot a mean line in a plot

Hello everyone!

Could you please help me with a plot. When I plot a mean v, it plots differently as 0. I need to mean line to be at the same angle as my fluctuations.

My code is:

clear all; close all;
N=100;
t = (0:N);
t1=(0:N-1);
t2=(0:N-1);
tt = rand(1,N) * 2 * pi;
ang = rand(1,N) * 2 * pi;
amp_u = 2; 
amp_v = 1; 
amp_w = 0.5; 
u_mean=2;
v_mean=1;
w_mean=1;
u1 = amp_u.*sin(100*t2)+u_mean;
v1 = sin(ang) .* amp_v+v_mean;
w1=sin(ang) .* amp_w+w_mean;
u = cumsum([2, u1]);
x(1:N)=mean(u1);
v = cumsum([2, v1]);
w = cumsum([2, w1]);
figure(1); plot(t,u);
hold on 
plot(t1,x);                 

[Dyuman Joshi]

Mean will be a scalar, constant value and it plots accordingly as well.

"When I plot a mean v ..."

You are not plotting v in your code above.

"I need to mean line to be at the same angle as my fluctuations."

Can you explain what do you mean by this? Perhaps a figure will be more helpful.

Answer 1

[Star Strider]

‘I need to mean line to be at the same angle as my fluctuations.’

You apparently want the linear regression of ‘u1’ as a function of ‘t1’ not the mean of ‘u1’.

Try this —

% clear all; close all;
N=100;
t = (0:N);
t1=(0:N-1);
t2=(0:N-1);
tt = rand(1,N) * 2 * pi;
ang = rand(1,N) * 2 * pi;
amp_u = 2; 
amp_v = 1; 
amp_w = 0.5; 
u_mean=2;
v_mean=1;
w_mean=1;
u1 = amp_u.*sin(100*t2)+u_mean;
v1 = sin(ang) .* amp_v+v_mean;
w1=sin(ang) .* amp_w+w_mean;
u = cumsum([2 u1]);
% x(1:N)=mean(u1);
B = [t(:) ones(size(t(:)))] \ u(:);                     % Linear Regression Parameters
x = [t2(1) 1; t2(end) 1] * B;                           % Linear Regression Evaluation
v = cumsum([2, v1]);
w = cumsum([2, w1]);
figure(1)
plot(t,u)
hold on 
plot(t1([1 end]),x)
ylim([0 max(ylim)])

While I am thinking about it, do you have any thoughts on my Answer to plot a graph from user input?

.

Answer 2

[Askic V]

Perhaps, you can use this code:

plot(t1,x.*t1); 

Answer 3

[Sylvain]

Your question is not veary clear, but I think you want to plot:

plot(t,mean(u1)*t)