How to get an area plot with varying colour intensity (1-D plot).

How to get 1-D area plot with varying colour intensity?

Answer 1

[KSSV]

t = linspace(0,2*pi) ;
x = sin(pi/2*t) ;
fill(x,t,x) ;   % patch also can be used

If you have the exact fft data, you can get the one shown in image.

Answer 2

[Massimo Zanetti]

I have found this workaround...

%3d coordinates of a curve
x = 0:.05:2*pi;
y = sin(x);
z = zeros(1,numel(x));
%color vector: a set of values that are mapped in the colorbar
col = rand(1,numel(x)); 
%plot the curve as a surface
surface([x;x],[z;y],[z;z],[col;col],...
        'facecol','no',...
        'edgecol','interp',...
        'linew',2);
grid on; view([90,45,45]);
colorbar;
xlabel('x');
ylabel('y');
zlabel('z');
view([0,90]);

I have used random colors, but you play with it.