'Special grid' on a plot

2016 10 30
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更新时间：2016 10 30
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Hi, I have to draw a 'special grid' on a plot of a signal. Specifically, I need one vertical line after 8s and one 10s after the first (and then periodically in this order: 8s,10s,8s,10s etc etc..) How can I do this? I tried to use meshgrid but without results.
Thank you!

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dpb
dpb 2016-10-30
Note the location in a time vector of some number of seconds will be
ix=round(T/dt);
where T is the set of desired times and dt the sample rate...

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Riccardo Brambilla
Riccardo Brambilla 2016-10-30

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Thank you both for your time; I solve the problem in this way!
t = [0:1:size(sx)-1]'./fs;
a = ceil(t(end));
x = [8:18:a];
y = [18:18:a];
z = [x;y];
z = z(:).';
plot(t,sx,t,dx);
legend('pupil sx', 'pupil dx');
ax = gca;
ax.XGrid = 'on';
ax.YGrid = 'off';
ax.XTickMode = 'manual'; % keep the same number of 'grid lines' even after resize
ax.XTick = z;
ax.XMinorTick = 'on';

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