plotting 2 x points per y?

If i had an array of two x points like

{x} = [-1.9 2], [-1.8, 1.8], [-1.5, 1.3]

how can i plot these points for lets say y = 0, 0.05, 0.1

so for example, for y = 0, i would have x = -1.9 and x = 2 plotted. so it will look like a triangular wave?

Answer 1

[Image Analyst]

Try this:

x = [-1.9 2; -1.8, 1.8; -1.5, 1.3]
y = [0, 0.05, 0.1]
plot(x(:,1), y, 'b*-', 'LineWidth', 2);
hold on;
grid on;
plot(x(:, 2), y, 'rd-', 'LineWidth', 2);

Look how each Y value occurs at two different X values.