Line plot for irregular timeseries data

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vignesh mohan
vignesh mohan 2021-12-6
评论： vignesh mohan 2021-12-9
Hello everyone i am new to matlab.
First i convert into datetime format.
1.my question is how to plot line graphs for irregular timeseries data.
2.How to set datetick format in x-axis.
i attached my excel file and code which i tried also.
some sample plot also i added
.
I hope i will get answer for this thank you advance
Plot(book.date,book.Nnuc)
datetick('x','dd-MM-yyyy HH:mm:ss','keepticks');

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Chunru
Chunru 2021-12-6
编辑：Chunru 2021-12-9
Ran in:
a = readtable("book.xlsx");
idx = find(diff(a.date) > 1.2/24); % find the location of large time gap
a.Nnuc(idx+1) = nan; % use nan to remove the part
plot(a.date, a.Nnuc)
datetick('x');
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Chunru
Chunru 2021-12-9
Your current data has 1h interval except for some gap. The statement above 1.2/24 is to find the gap greater than 1.2h (datetime has a unit of 'day' so we need the division by 24).
If your normal time interval is 15 min and you expect a gap is larger than 15 min, you can cahnge 1.2/24 into 1.2*(15/60)/24 where 15/60/24 is to conversion from min to day. A factor of 1.2 is to check if the gap is 1.2*15min=18min.

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