Show only a part of the yaxis

How can I show only a part of the yaxis (i.e. from zero to infinity), as shown in the right figure, here below?

My desired output is the figure on the right. The original figure comes from

https://stackoverflow.com/questions/1490778/how-to-show-x-and-y-axes-in-a-matlab-graph

Answer 1

[Les Beckham]

Here is a kind of messy workaround. Note that this doesn't work if you have the grid on.

h = plot(linspace(-2, 2, 1000), atan(linspace(-2, 2, 1000)));
set(gca, 'XAxisLocation', 'origin', 'YAxisLocation', 'origin');
% draw a white line over the top of the bottom half of the y axis
line([0 0], [0 min(ylim)], 'Color', [1 1 1]);
set(gca, 'Ytick', [0 0.5 1]) % turn off the y ticks at -1 and -0.5

[Sim]

Thanks a lot @Les Beckham! ......actually, I would need also the grid on....any suggestion?

[Les Beckham]

You are quite welcome. Thanks for accepting my answer.

This is even messier, but it works.

h = plot(linspace(-2, 2, 1000), atan(linspace(-2, 2, 1000)));
grid on
set(gca, 'XAxisLocation', 'origin', 'YAxisLocation', 'origin');
% draw a grey line over the top of the bottom half of the y axis
line([0 0], [0 min(ylim)], 'Color', [0.9 0.9 0.9]);
line([0 0.1], [-0.5 -0.5], 'Color', [0.9 0.9 0.9]); % cover up the tick at y = -0.5
line([0 0.1], [-1 -1], 'Color', [0.9 0.9 0.9]);     % cover up the tick at y = -1
set(gca, 'Yticklabels', {'', '', '', '', '0.5', '1'})
set(gca, 'Xticklabels', {'', '-1.5', '-1', '-0.5', '0', '0.5', '1', '1.5'})

[Sim]

That's great @Les Beckham!! :-) Many Many thanks :-)

[Les Beckham]

Of course. Have a great day.