Separating daytime and nighttime according to daily sunset and sunrise values

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Cakil
Cakil on 16 Nov 2022
Commented: Cakil on 16 Nov 2022
Hello Matlab Community,
I have sunrise and sunset times for a period of time and also have a dataset for that certain period.
My dataset includes hourly values while sunset and sunrise data is daily. So I have dublicated 24 times my sunrise and sunset values to have the same number of rows with dataset.
srise24 = repelem(srise,24)
sset24=repelem(sset,24)
srise24tt = datetime(srise24,'ConvertFrom','datenum')
sset24tt=datetime(srise24,'ConvertFrom','datenum')
I want to seperate my data according to day and night time and using very simple equation as below:
Daytime=Data1(Data1>srise([1:end-1],1)&Data1<sset24([1:end-1],1))
My "Daytime" value only includes the time I wanted to filter but I also want to have corresponding values to these dates.
I will appreciate your support.
Thanks!

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Accepted Answer

Stephen23
Stephen23 on 16 Nov 2022
Edited: Stephen23 on 16 Nov 2022
Ran in:
M1 = load('Data1.mat')
M1 = struct with fields:
Data1: [3839×3 double]
D = M1.Data1;
DT = datetime(D(:,1),'ConvertFrom','datenum')
DT = 3839×1 datetime array
01-Dec-2018 01:00:00 01-Dec-2018 02:00:00 01-Dec-2018 03:00:00 01-Dec-2018 04:00:00 01-Dec-2018 05:00:00 01-Dec-2018 06:00:00 01-Dec-2018 07:00:00 01-Dec-2018 08:00:00 01-Dec-2018 09:00:00 01-Dec-2018 10:00:00 01-Dec-2018 11:00:00 01-Dec-2018 12:00:00 01-Dec-2018 13:00:00 01-Dec-2018 14:00:00 01-Dec-2018 15:00:00 01-Dec-2018 16:00:00 01-Dec-2018 17:00:00 01-Dec-2018 18:00:00 01-Dec-2018 19:00:00 01-Dec-2018 20:00:00 01-Dec-2018 21:00:00 01-Dec-2018 22:00:00 01-Dec-2018 23:00:00 02-Dec-2018 00:00:00 02-Dec-2018 01:00:00 02-Dec-2018 02:00:00 02-Dec-2018 03:00:00 02-Dec-2018 04:00:00 02-Dec-2018 05:00:00 02-Dec-2018 06:00:00
M2 = load('sunrise and sunset.mat')
M2 = struct with fields:
srise: [160×1 double] srise24: [3840×1 double] srise24tt: [3840×1 datetime] sset: [160×1 double] sset24: [3840×1 double] sset24tt: [3840×1 datetime]
SR = datetime(M2.srise,'ConvertFrom','datenum')
SR = 160×1 datetime array
01-Dec-2018 09:18:37 02-Dec-2018 09:25:42 03-Dec-2018 09:33:15 04-Dec-2018 09:41:29 05-Dec-2018 09:50:49 06-Dec-2018 10:02:20 07-Dec-2018 10:23:40 08-Dec-2018 10:29:40 09-Dec-2018 10:30:06 10-Dec-2018 10:30:32 11-Dec-2018 10:30:58 12-Dec-2018 10:31:25 13-Dec-2018 10:31:52 14-Dec-2018 10:32:20 15-Dec-2018 10:32:48 16-Dec-2018 10:33:16 17-Dec-2018 10:33:44 18-Dec-2018 10:34:12 19-Dec-2018 10:34:41 20-Dec-2018 10:35:09 21-Dec-2018 10:35:38 22-Dec-2018 10:36:07 23-Dec-2018 10:36:36 24-Dec-2018 10:37:05 25-Dec-2018 10:37:34 26-Dec-2018 10:38:02 27-Dec-2018 10:38:31 28-Dec-2018 10:39:00 29-Dec-2018 10:39:28 30-Dec-2018 10:39:57
SS = datetime(M2.sset,'ConvertFrom','datenum') % These sunset times look very odd...
SS = 160×1 datetime array
01-Dec-2018 11:35:10 02-Dec-2018 11:28:49 03-Dec-2018 11:22:02 04-Dec-2018 11:14:34 05-Dec-2018 11:06:02 06-Dec-2018 10:55:20 07-Dec-2018 10:34:49 08-Dec-2018 10:29:40 09-Dec-2018 10:30:06 10-Dec-2018 10:30:32 11-Dec-2018 10:30:58 12-Dec-2018 10:31:25 13-Dec-2018 10:31:52 14-Dec-2018 10:32:20 15-Dec-2018 10:32:48 16-Dec-2018 10:33:16 17-Dec-2018 10:33:44 18-Dec-2018 10:34:12 19-Dec-2018 10:34:41 20-Dec-2018 10:35:09 21-Dec-2018 10:35:38 22-Dec-2018 10:36:07 23-Dec-2018 10:36:36 24-Dec-2018 10:37:05 25-Dec-2018 10:37:34 26-Dec-2018 10:38:02 27-Dec-2018 10:38:31 28-Dec-2018 10:39:00 29-Dec-2018 10:39:28 30-Dec-2018 10:39:57
SS = SS + hours(12) % ... I will presume that they are off by 12 hours.
SS = 160×1 datetime array
01-Dec-2018 23:35:10 02-Dec-2018 23:28:49 03-Dec-2018 23:22:02 04-Dec-2018 23:14:34 05-Dec-2018 23:06:02 06-Dec-2018 22:55:20 07-Dec-2018 22:34:49 08-Dec-2018 22:29:40 09-Dec-2018 22:30:06 10-Dec-2018 22:30:32 11-Dec-2018 22:30:58 12-Dec-2018 22:31:25 13-Dec-2018 22:31:52 14-Dec-2018 22:32:20 15-Dec-2018 22:32:48 16-Dec-2018 22:33:16 17-Dec-2018 22:33:44 18-Dec-2018 22:34:12 19-Dec-2018 22:34:41 20-Dec-2018 22:35:09 21-Dec-2018 22:35:38 22-Dec-2018 22:36:07 23-Dec-2018 22:36:36 24-Dec-2018 22:37:05 25-Dec-2018 22:37:34 26-Dec-2018 22:38:02 27-Dec-2018 22:38:31 28-Dec-2018 22:39:00 29-Dec-2018 22:39:28 30-Dec-2018 22:39:57
fh = @(t) any(isbetween(t,SR,SS));
ix = arrayfun(fh,DT) % TRUE/FALSE = daylight/night, index is same size as DT
ix = 3839×1 logical array
0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 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1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
You can do what you want with this, e.g. select daytime and nightime data:
format long G
Data_day = D(ix,:)
Data_day = 3048×3
1.0e+00 * 737395.416666667 12.8258095238095 12.955380952381 737395.458333333 12.8238181818182 12.9564090909091 737395.5 12.8236956521739 12.9546086956522 737395.541666667 12.8240833333333 12.9525 737395.583333333 12.8207916666667 12.9515 737395.625 12.820125 12.9501666666667 737395.666666667 12.8197916666667 12.951875 737395.708333333 12.8164583333333 12.94975 737395.75 12.816125 12.9469583333333 737395.791666667 12.816125 12.9459166666667
Data_night = D(~ix,:)
Data_night = 791×3
1.0e+00 * 737395.041666667 12.8448333333333 12.9519166666667 737395.083333333 12.8414615384615 12.9522307692308 737395.125 12.8380714285714 12.9519285714286 737395.166666667 12.8343333333333 12.9544 737395.208333333 12.82925 12.9550625 737395.25 12.8259411764706 12.9562941176471 737395.291666667 12.8256666666667 12.9553333333333 737395.333333333 12.8260526315789 12.955 737395.375 12.82705 12.9565 737396 12.8079166666667 12.946

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