Holding Plots In A Loop

Hello,

I am trying to subplot 2 figures, i.) n-th roots of unity and ii.) one other complex number. While the complex number plot comes as fine, the root of unity plot Windows is lefts blank, additionally I get another blank window. Where have I mistaken? Here is the code:

figure
subplot(2,1,1)       % add first plot in 2 x 1 grid
plot(c1, '+');
title('Plot of the Product')

subplot(2,1,2)
hold on;
while lim_plot > 0
    plot(nthroot(1,lim_plot), '*');
    lim_plot = lim_plot - 1;
end
hold off;
title('Roots of Unity')

So, instead of having multiple superimposed plots for root's of unity, I have just 1. I want all the roots of unity until the user input limit lim_plot to be superimposed in the second graph!

Thanks.

Answer 1

[Nick Counts]

Your sample code was missing some variable definitions, so there may be other issues, but here is what I see:

Assuming that you are passing your lim_plot > 0 test, your next line is calls nthroot on the vector [1] and asks for the lim_plot^th real root of [1].

help nthroot

If I change that line to:

plot(nthroot(c1,lim_plot), '*');

I get the output you are looking for (assuming that my dummy lim_plot and c1 variables are similar to yours).

Hopefully that helps.

Cheers