How to convert date by changine date format from text file?
3 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Dogan Deniz Karadeniz
le 25 Juin 2019
Modifié(e) : Kojiro Saito
le 26 Juin 2019
I'd like to convert date according to first three column as day-month-year hour:minute:second.
- A column: Year
- B column: Day of the year
- C column: Hour
I tried to do it, not achieving.
0 commentaires
Réponse acceptée
Kojiro Saito
le 25 Juin 2019
Modifié(e) : Kojiro Saito
le 26 Juin 2019
Simply, you can utilize table's functioinalities.
t = readtable('test5.txt');
% Create datetime and display as "day-month-year hour:minute:second" format
dt = datetime([t.Var1 ones(height(t), 1) t.Var2 t.Var3 zeros(height(t), 1) zeros(height(t), 1)], 'Format', 'dd-MM-yyyy HH:mm:ss');
% Insert datetime variable to the table as "datestr" column
t.datestr = dt;
% Write a table as a file
writetable(t, 'output.txt')
UPDATED
Based on your comment, the following is what you want. removevars and movevars were introduced in R2018a.
t = readtable('test5.txt');
% Convert to datetime
dt = datetime([t.Var1 ones(height(t), 1) t.Var2 t.Var3 zeros(height(t), 1) zeros(height(t), 1)]);
% Insert datetime variables to original table
t.datestr = datetime(dt, 'Format', 'dd-MM-yyyy');
t.timestr = datetime(dt, 'Format', 'HH:mm:ss');
% Delete column 1 to 3
T2 = removevars(t, 1:3);
% Move datestr and timestr to the first and second columns
T2 = movevars(T2, {'datestr', 'timestr'}, 'Before',1);
% Write table as a tab separated file without headers
writetable(T2, 'output.txt', 'WriteVariableNames', false, 'Delimiter', 'tab')
2 commentaires
Plus de réponses (1)
Himanshu Rai
le 25 Juin 2019
Try this function, it accepts three vectors corresponding to year, day and hour
function Dt = conv(Year, Day, Hour)
Dt = datetime(Year, 1, 1) + Day - 1 + hours(Hour);
end
6 commentaires
Himanshu Rai
le 25 Juin 2019
If you want to read data from the file, use this link - textscan. However note that this was not what was specified in your question. If you want something else please specify it clearly in your question.
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!