Hi Emma,
To sum up the precipitation measurements on a daily basis from a dataset where each measurement is taken every 10 minutes, you can use MATLAB's "dateshift" function to extract the date from the datetime and then use MATLAB's "groupsummary" function to sum the precipitation for each day.
The below code snippet explains how to achieve this using dummy data:
%dummy data
numMeasurements = 4464;
startDate = datenum(2023, 1, 1, 0, 0, 0);
datenumArray = startDate + (0:10:(numMeasurements-1)*10)'/1440;
precipitationArray = rand(numMeasurements, 1); % Random precipitation values
T = table(datenumArray, precipitationArray, 'VariableNames', {'Datenum', 'Precipitation'});
% Convert 'Datenum' to 'datetime'
T.Time = datetime(T.Datenum, 'ConvertFrom', 'datenum');
% Add a new column to group by date
T.Date = dateshift(T.Time, 'start', 'day');
% Sum the precipitation for each day
dailyPrecipitation = groupsummary(T, 'Date', 'sum', 'Precipitation');
% Display the result
disp(dailyPrecipitation);
For more details, please refer to the following MathWorks documentations:
- datetime - https://www.mathworks.com/help/matlab/ref/datetime.html
- dateshift - https://www.mathworks.com/help/matlab/ref/datetime.dateshift.html
- groupsummary - https://www.mathworks.com/help/matlab/ref/double.groupsummary.html
Hope this helps!
