Plotting with an array in an equation

If I had an array of angles (the phi value), and I wanted to use them to plot m against iterations of the simulation (N) (as shown in the attached image), then how do it?

I tried this before but since the angles are in an array and I'm trying to add all of them together and multiply them by 1/N, I can't seem to be able to plot them.

I think I need to make an array for the m values to them lnspace and plot against N, but I've not had much success in getting it to work.

Sorry for the poor explanation.

[Scott MacKenzie]

No image was attached

[Oliver Ford]

It shows up for me, the m(t) one

[Scott MacKenzie]

To me, your question parses to "to plot m ... as shown in the attached image". I was expecting an example image of the plot. If you could provide an example plot, that would probably help.

[Oliver Ford]

[Walter Roberson]

Are there N phi values or is the division by a value that is unrelated to the number of phi values?

[Oliver Ford]

So essentially it's 1/(number of iterations) multiplied by the sum of the angles at that iteration. If that makes any sense?

Answer 1

[Walter Roberson]

Let theta be an N by number_of_angles array (so each row refers to a different time step)

m_temp = sum(cos(theta),2);

At this point, you need to decide whether the division is by the number of iterations that had occurred up to that point, or if it is by the total number of iterations. If it is by the total number of iterations, then

m = m_temp / N;
plot(m)

If it is by the number of iterations to that point, then

m = m_temp ./ (1:N);
plot(m)