Plotting the difference between 2 vectors points in 2D

I have two vectors [x1,x2...xn] and [y1,y2...yn]. y is simply a noisy version of x. After plotting x on a 2D graph with connected points, I would like to plot just the points of y, with a straight line connecting each point of y to the corresponding "true" point in x. Thanks!

Answer 1

[Walter Roberson]

Provided that the original x and y are row vectors,

hold on
h = plot([x; y]);
set(h, 'Color', 'k')

The 'k' means black, a color I chose arbitrarily for this purpose. Without that set() call, each of the lines will show up a different color.

[Matt]

Walter, thanks for the quick reply. However, I am not sure this is the answer. For example, take the arbitrary x and noisy x (y):

t = [0 1 2 3 4];

x = [1 1 2 2 3];

y = x + 0.2*randn(1,5);

plot(t,x)

%here I would try your answer:

hold on

h = plot([x;y]);

set(h, 'Color', 'k')

For some reason this produces a strange graph.

[Walter Roberson]

h = plot(t, [x;y])

You need to be consistent on your x axis coordinates.