How to limit y-axis of eye-diagram?

I have attached the image in which i don't need whole plot but only the signal areas.

x = load (['frame_snr30256QAM' num2str(i) '.mat']);
sps = 8;
eyediagram(abs(x.frame),sps)
     %set(get(gcf, 'Children'), 'Visible', 'off')
ylim([2 0])
error
Error using ylim (line 31)
Limits must be a 2-element vector of increasing numeric values.

Answer 1

[Image Analyst]

[2 0] is not "increasing numeric values". Try

ylim([0, 2]);