Something wrong with the "grid" when I use "semilogy"

BER_simp_M64CR10 =[0.246800130208333 0.194526114583333 0.146794796875000 0.105257096354167 0.0684102031250000 0.0369825703125000 0.0148475182291667 0.00374145052083333 0.000454960937500000 1.79427083333333e-05 2.70833333333333e-07 2.86458333333333e-08 1.82291666666667e-08 1.04166666666667e-08 2.86458333333333e-08 0];

semilogy(SNR,BER_map_M64CR10,'-ok','LineWidth',0.5);

grid on;

I don't know why I get this figure. "grid" in "semilogy" is ok when the I plot other results. please help me. Thank you!

[Image Analyst]

I don't understand the problem. Also, what are the "other results"?

Answer 1

[the cyclist]

I'm making a wild guess here, but do you mean that you are getting grid lines where you do not expect them? Or vice versa?

Perhaps try to set the positions of the y-axis ticks manually:

set(gca,'YTick',10.^(-8:0))

and depending on whether you want grid lines at the minor ticks, you can use

set(gca,'YMinorGrid','off')

or

set(gca,'YMinorGrid','on')

But it would be good if you could explain more precisely what the problem is.

[Image Analyst]

Maybe he wanted grid lines like on some log plots where they put lines at linear locations and it looks like the grid lines get closer together like this: