I copied and pasted the following code that describes a Fourier Series
% Define domain
dx = 0.001;L = pi;x = (-1+dx:dx:1)*L;n = length(x); nquart = floor(n/4);% Define function
f = x;plot(x,f,'-k','LineWidth',1.5), hold on% Compute Fourier series
CC = jet(20);A0 = sum(f.*ones(size(x)))*dx;fFS = A0/2; for k=1:20A(k) = sum(f.*cos(pi*k*x/L))*dx; % Inner product
B(k) = sum(f.*sin(pi*k*x/L))*dx;fFS = fFS + A(k)*cos(k*pi*x/L) + B(k)*sin(k*pi*x/L);plot(x,fFS,'-','Color',CC(k,:),'LineWidth',1.2) endlegend('Function: f(x) = x',... 'Terms: N = 20','Interpreter','latex','Fontsize',16,... 'Location','northwest')
I noticed, that the color of "Terms" in legend is always blue (so k = 1). However, I want it to be the color of the kth Function, im my case k = 20.
How to achieve that? A common problem with coppied function.
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