How to show x and y axes in a MATLAB graph?

Question

I am drawing a graph using the plot() function, but by default it doesn't show the axes.

How do we enable showing the axes at x=0 and y=0 on the graph?

Actually my graph is something like:

And I want a horizontal line corresponding to y=0. How do I get that?

Answer 1

This should work in Matlab:

set(gca, 'XAxisLocation', 'origin')

Options are: bottom, top, origin.

For Y.axis:

YAxisLocation; left, right, origin

Answer 2

By default, plot does show axes, unless you've modified some settings. Try the following

hold on; % make sure no new plot window is created on every plot command
axes(); % produce plot window with axes
plot(% whatever your plot command is);
plot([0 10], [0 0], 'k-'); % plot the horizontal line