Can you exclude dates in date range using xlim?

I have a dataset where the x axis is time and the y axis is sound pressure level in dB. The data is recorded continuously on a 24hr cycle, but I'm not interested in the data collected at night. Is there a way to exclude this data using xticks or xlim?

At the moment I have:

xlim([start_dt, end_dt]); %filter to date range of interest

Would the best way to address this be to replace sd with multiple datetime ranges somehow to exclude the evening data? I'm not sure how to code this?

[Sulaymon Eshkabilov]

With xticks() and xticklabels(), you can show any values you'd need to display.

[Louise Wilson]

Could you give an example of how it would be coded in terms of the date range?

[KSSV]

While plotting itself, you take the required data and plot.

[Louise Wilson]

That is really not helpful, haha.

Answer 1

[Chunru]

dn = now + [0:.5:48]/24;

y = randn(size(dn));

subplot(311)
plot(dn, y)
datetick('x')

subplot(312)
idx = hour(dn)>7 & hour(dn)<20;  % day
dn1=dn(idx);
y1=y(idx);
plot(dn1, y1)
datetick('x')

subplot(313)
idx = hour(dn)>7 & hour(dn)<20;  % day
dn1=dn(idx);
y1=y(idx);
plot(1:length(y1), y1)

hold on
i1 = find(diff(dn1)>0.6/24);
xline(i1+1);

h=gca;
h.XTick=1:5:length(y1);
h.XTickLabel = datestr(dn1(1:5:end), 'HH:MM:SS');
h.XTickLabelRotation = 30;

[Louise Wilson]

Thank you!

[Louise Wilson]

After

xline(i1+1);

I get the error:

Error using xline (line 29)
Passing multiple values to ConstantLine is not supported.

Any ideas?

[Chunru]

What is your matlab ver? A work around is:

hold on
i1 = [4.1 5.3];
for i=1:length(i1)
    xline(i1(i)+1);
end