How to plot specific graph

hello all

im trying to graph in a certain way and was hoping to learn how to do this. attatched is what im trying to do but not sure how to do it in matlab. thank you!!

http://imageshack.us/photo/my-images/684/graphyz.jpg/

Answer 1

[Image Analyst]

x = 1:4;
y1 = [40 0 0 0];
y2 = [-28 0 0 0];
bar(x, y1, 'FaceColor', 'r');
hold on;
bar(x, y2, 'FaceColor', [.5 .5 .5]);
grid on;

[Matlabbey]

hi! thanks for the response, but how do i make it so the bottom numbers are not negative? can i make that axis positive also? i'm not sure for the formatting. thank you!!

[Image Analyst]

You can reset the tick labels to be anything you want, for example you could take the absolute value and write them back out as positive. Look up tick labels in the help for examples.