Repeating a day of the year sequence from a specified date input
2 views (last 30 days)
Show older comments
I'm trying to repeat a day of the year sequence in a for loop after the "day_num_index" reaches day 365. I want it to repeat the sequence (day 1 - day 365) and start over at day 1 after day 365 is reached. I need it to loop through for a specified number of iterations until the final index of the loop is reached. Additionally, the code should be compatible with any initial specified date (i.e. 1-Oct-2020 in the example provided below) throughout the year.
Anyone have some suggestions?
0 Comments
Answers (1)
Peter Perkins
on 27 Apr 2020
Right off the bat, 365 is a bug. I can't tell if you want to start at, say, 1-Oct-2020, and increment the day until you get to 31-Dec-2020 and wrap around to 1-Jan-2020 and keep going like that until you've had 1000 iterations, or if you want to increment the day until you get to 30-Sep-2021 and wrap around to 1-Oct-2020 and keep going like that until you've had 1000 iterations.
In either case, just let datetime do the incrementing and you do the modulo. Something like
startDate = datetime(2020,10,1);
wrapDate = dateshift(startDate,'start','year','next') - caldays(1);
% or wrapDate = startDate + calyears(1) - caldays(1);
d = startDate - caldays(1);
for i = 1:1000
if d == wrapDate
d = d - calyears(1);
end
d = d + caldays(1);
disp(d)
end
See Also
Categories
Find more on Dates and Time in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!