How to make a plot with specific scale (Max, Min, and difference)

I would like to ask a help, I need my plot have y-axis with difference 0.2, for example,

the plot result shows y(x) are 0 to 1, and it's difference is about 0.1 (0, 0.1, 0.2, 0.3, .... 1), but I need to make it 0.2 (0, 0.2, 0,4,....1).

What should I write to overcome it? Thank you.

Answer 1

[Chunru]

x = 0:90;
y = rand(size(x));

plot(x, y);
grid on
yticks(0:.2:1)          % Change the yticks interval

[Sasha]

Thank you for your kind help.