HOW TO FILTER AN HOUR DATA FROM ARRAY OF DAILY,MONTHLY AND YEAR DATA
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I HAVE DATA WITH FOLLOWING COLUMN: DATE, TIME, S/N, VALUES AS SHOWN IN THE ATTACHED FILE. KINDLY HELP ME WITH CODE TO SEPARATE THE DATA INTO DIFFERENT HOURS SUCH AS 7.30, 8.30, ..., 15.30 AND DIFFERENT MONTHS, JANUARY, FEBRUARY, ... THANKS.
OJO O.S. ojoso@futa.edu.ng
2 commentaires
Scott MacKenzie
le 19 Juin 2021
What do you mean by "separate"? Do you want the data sorted by hour, or sorted by month? Or something else?
Réponses (1)
Scott MacKenzie
le 19 Juin 2021
Modifié(e) : Scott MacKenzie
le 22 Juin 2021
T = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/658625/SAMPLE%20DATA.xlsx');
% combine DATE and TIME columns and replace as single DateTime column
DateTime = T.DATE + T.TIME;
DateTime.Format = 'yyyy-MM-dd HH:mm';
T = [table(DateTime) T(:,3:end)];
% for sorting, create separate columns for year, month, and hour
T.Year = year(T.DateTime);
T.Month = month(T.DateTime);
T.Hour = hour(T.DateTime);
yearColumn = find(string(T.Properties.VariableNames) == "Year");
monthColumn = find(string(T.Properties.VariableNames) == "Month");
hourColumn = find(string(T.Properties.VariableNames) == "Hour");
% sort by month
T1 = sortrows(T, monthColumn);
% sort by hour
T2 = sortrows(T, hourColumn);
% sort by hour, separately within each year
T3 = sortrows(T, [yearColumn hourColumn]);
4 commentaires
Scott MacKenzie
le 21 Juin 2021
Converting to a double array is simple except for the 1st column, since the data in the 1st column are DateTime.
If you just want the numeric data, which start in the 2nd column, then
T{:,2:end}
If you want to include the DateTime information, it must be converted to a serial date number. This will do the trick:
[datenum(T.DateTime) T{:,2:end}]
Voir également
Catégories
En savoir plus sur Dates and Time dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!