MATLAB: Need help making a stairs graph

Question

Hi can anyone tell me how to make a stair graph? For example, I have two y values, the fist is 3 when x is from 0 to 4, the second is -3 when x is from 4 to 8.

Since the total length is 8, I put

x=8;

y=??;

but what do I need to put for y? when there are two difference values but I need them on the same graph.

stairs(x,y)

Best Regards

Samious

Answer 1

Try this:

x = 0 : 8
y = [3,3,3,3, -3,-3,-3,-3,-3];
stairs(x, y, 'bo-', 'LineWidth', 3);
ylim([-4, 4]);
grid on;