how to get the value in julian date and time

5 views (last 30 days)
suppose we have 2014-04-29 4:35:22 date and time then how to convert the date and time together in julian, keeping 2000 as a starting reference.
  2 Comments
Michael Soskind
Michael Soskind on 7 May 2020
Is there a reason that the function juliandate does not work for you? Are you using Matlab 2014b or newer?

Sign in to comment.

Accepted Answer

Kelly Kearney
Kelly Kearney on 7 May 2020
Can you explain what you're defining as "Julian date"? While the 4714 BCE reference date is the proper one for a real Julian date, I know the term is often used in my field to mean either day-of-year or days-since-reference-date. My guess is you want the last option, in which case
tstr = '2014-04-29 4:35:22';
jd = days(datetime(tstr) - datetime(2000,1,1))

More Answers (1)

Michael Soskind
Michael Soskind on 7 May 2020
Hi Monica,
The following code should work for your example:
% Julian Date Example
% modified from https://www.mathworks.com/help/matlab/ref/datetime.juliandate.html
t1 = datetime('2014-04-29 4:35:22'); % Time input in traditional datetime format
t1.TimeZone = 'America/New_York' % Setting the timezone
% Printing the Julian date as the number of days and fractional days since
% noon on November 24, 4714 BCE
format longG % Defining the format to print Julian Date
jd1 = juliandate(t1)
Hope that helps,
Michael
  2 Comments
MONICA RAWAT
MONICA RAWAT on 7 May 2020
yeah i tried this,but the reference point is from November 24, 4714 BCE, but i want from 2000
Michael Soskind
Michael Soskind on 7 May 2020
Sorry I misinterpretted the question; Kelly just answered that for you, below.

Sign in to comment.

Categories

Find more on Dates and Time in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!