How to set the grid line of y-axis by 5 ?

I want to add a grid on my plot. Unofrtunetely, I found only Grid normal and Grid miror,

I want to add a grid that appear every 5 value on y-axis, for example:

Answer 1

[Voss]

Maybe something like this?

ax = gca();
set(ax, ...
    'XLim',[0.7 4.5], ...
    'YLim',[0 40], ...
    'XTick',1:4, ...
    'YTick',0:5:40, ...
    'GridColor','r', ...
    'XGrid','on', ...
    'YGrid','on');

ytl = get(ax,'YTickLabels');
ytl(2:2:end) = {''};
set(ax,'YTickLabels',ytl);

Answer 2

[Star Strider]

If you have R2018b or later, the easiest solution would likely be the xline and yline functions.

x = 0:5;
y = randi(40, size(x));

figure
plot(x, y)
xline(1:5,'-r')
yline(5:5:40,'-r')
yticks(0:10:40)

.