Can you exclude dates in date range using xlim?

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Louise Wilson
Louise Wilson 2021-10-21
评论： Chunru 2021-10-22
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?
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KSSV
KSSV 2021-10-21
While plotting itself, you take the required data and plot.

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Chunru
Chunru 2021-10-21
编辑：Chunru 2021-10-21
Ran in:
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;
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Louise Wilson
Louise Wilson 2021-10-21
After
xline(i1+1);
I get the error:
Error using xline (line 29)
Passing multiple values to ConstantLine is not supported.
Any ideas?
Chunru
Chunru 2021-10-22
Ran in:
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

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