convert monthly date time to daily in matlab

To convert monthly datetime to daily in Matlab, you can use repelem function to extend monthly datetime to daily datetime and days function to create a sequence of dates.

Here is an example code:

main.m
monthlyDates = datetime(2021,1:3,1);
dailyDates = repelem(monthlyDates,days(monthlyDates,'month')');

% Print the result
disp(dailyDates')
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In this example code, we first created a monthly datetime vector monthlyDates with 3 elements.

Then, we extended each monthly datetime to a sequence of daily datetime using repelem function. The second input of repelem is the number of times to repeat each element, which is obtained by the days function that returns the number of days in each month for the given datetime.

Finally, we printed the resulting daily datetime vector using disp function.

Note that the resulting dailyDates vector will contain all the daily datetime values between the first day of the first month and the last day of the last month in the original monthlyDates vector. If you want to restrict the daily datetime values to a specific range, you can use intersect function to select only the datetime values that are within that range.