making axes distinct from other grid

Question

Does anyone know how to make x-axis and y-axis look a bit bolder or somehow distinct from other grids?

Somehow I want it to look like this

Answer 1

The stupidest thing I can think of is drawing a line with LineWidth = 2

figure();
plot([0 0],[-200 200],'LineWidth',2,'Color',[0 0 0])
hold on;plot([-200 200],[0 0],'LineWidth',2,'Color',[0 0 0])

Though it has some obvious disadvantages, like that it ends at some place.

Answer 2

Check out hline and vline from the MATLAB File Exchange. It will let you draw horizontal and vertical lines at any given point and extend those lines to infinity (so redoing axes will still keep the lines drawn all the away across your plot). If you need to draw to specific handles, here's an advanced hline/vline.