JDlist

Contents: Description, Arguments, Usage, Examples, Sub-Functions, Related Functions, Source Supported Under Version: > 1.14 Current .dvrc Version:  Description Returns a list of the Julian Day Numbers corresponding to the first day of each month of the input interval. Useful for plotting. Arguments and Return Values Parameters: Numbers (scalars) specifying the starting year and month and the number of months (steps) Return Value: A 2-by-n-by-1 float (single precision) array whose first column gives the rough "year fraction" (Y + (M-1)/12) and whose second column gives the corresponding Julian Day Numbers (JDN) for the first day of each of the n months, starting with the input year and month Usage Syntax: JDlist(year,month,n) The Julian Date is a continuous count of days since noon UTC on January 1, 4713 BCE in the proleptic Julian calendar. All inputs must be scalar integers. For years before 1, use astronomical numbering, e.g. 4713 BCE = -4712. (There was no year 0.) This function will guess the calendar mode (Julian or Gregorian), based on the latest input date. For (latest) input dates between October 15, 1582 and December 31, 1919 (when both calendar systems were in use), the function will print a warning about guessing the calendar mode. (Latest) dates before October 15, 1582 use the Julian calendar. (Latest) dates after that use the Gregorian (modern) calendar. This reflects the first changeover date. However, different countries changed at different times. See http://www.tondering.dk/claus/cal/node3.html When JDlist() is entered without any arguments, it prints its description, as shown below. Examples dv> JDlist() Returns the Julian Day Numbers corresponding to the first day of each month of the input interval JDlist(year,month,n) returns 2-by-n-by-1 array of JDN of first day of month for n months, starting with input year/month First column of output is rough "year fraction", Y + (M-1)/12 Second column of output is corresponding Julian Day Numbers Useful for plotting S.Marshall 08-25-2008 0 dv> # For the first day of each month of 2010: dv> JDlist(2010, 1, 12) 2x12x1 array of float, bsq format [96 bytes] 2010.00000000000 2455198.00000000 2010.08337402344 2455229.00000000 2010.16662597656 2455257.00000000 2010.25000000000 2455288.00000000 2010.33337402344 2455318.00000000 2010.41662597656 2455349.00000000 2010.50000000000 2455379.00000000 2010.58337402344 2455410.00000000 2010.66662597656 2455441.00000000 2010.75000000000 2455471.00000000 2010.83337402344 2455502.00000000 2010.91662597656 2455532.00000000 dv> # For the fifteenth day of each month of 2010: dv> JDlist(2010, 1, 12) + clone(1./24//14., 1, 12) 2x12x1 array of float, bsq format [96 bytes] 2010.04162597656 2455212.00000000 2010.12500000000 2455243.00000000 2010.20825195312 2455271.00000000 2010.29162597656 2455302.00000000 2010.37500000000 2455332.00000000 2010.45825195312 2455363.00000000 2010.54162597656 2455393.00000000 2010.62500000000 2455424.00000000 2010.70825195312 2455455.00000000 2010.79162597656 2455485.00000000 2010.87500000000 2455516.00000000 2010.95825195312 2455546.00000000

DavinciWiki Mini-Nav Bar Contents Functions Function Categories Common Procedures Glossary Download Davinci Change Log News Mailing List Contact Developers davinci-dev [AT] mars.asu.edu All other topics See navigation on the left Major Sub-Functions cat checkdate create float isint isscalar JD Related Functions JD MJDlist time.dvrc JDlist() Recent Library Changes Change Log Created On: 11-18-2009 Modified On: 05-07-2010