How can a draw a line between two points?

I have a plot that looks like the one below. I want to make vertical lines that connect each individual pair of blue & red points. How can I do this?

PARTIAL CODE:

plot(x, average,'o', 'MarkerEdgeColor', 'b', 'MarkerFaceColor', 'b');  % Blue points
hold on 
plot(x, average_2,'o', 'MarkerEdgeColor', 'r', 'MarkerFaceColor', 'r');  % Red points

Answer 1

[Kelly Kearney]

Assuming that x, average, and average_2 are all row vectors

axes;
hold on;
plot(x, average,'o', 'MarkerEdgeColor', 'b', 'MarkerFaceColor', 'b');  % Blue points
plot(x, average_2,'o', 'MarkerEdgeColor', 'r', 'MarkerFaceColor', 'r');  % Red points
plot([x;x], [average; average_2], '-k');

If the data are column vectors you'll have to transpose the arrays.

[Sandy]

Thank you!

Answer 2

[Azzi Abdelmalek]

plot(x, average,'-o', 'MarkerEdgeColor', 'b', 'MarkerFaceColor', 'b');
hold on 
plot(x, average_2,'-o', 'MarkerEdgeColor', 'r', 'MarkerFaceColor', 'r');  
hold off