A 2D plot with different colors for each point

Suppose time is a column vector of length Lt, freq and amp are matrces of size Lt * n. I want to plot a each column of freq against time such that color of each point should be determined using amp matrix. In fact I want to construct something like this:

Answer 1

[darova]

Using patch()

n = 30;
x = linspace(0,10,n)';
y = sin(x);
c = jet(n);
fv.vertices = [x y];
fv.faces = [1:n-1;2:n]';            % connection list
cla
h = patch(fv,'facevertexcdata',c,...
    'edgecolor','interp',...
    'linewidth',2,...
    'marker','o');