MJDlist
|
Contents: Description, Arguments, Usage, Examples, Sub-Functions, Related Functions, Source Supported Under Version: > 1.14
Description Returns a list of the Modified 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 Modified Julian Day Numbers (MJDN) for the first day of each of the n months, starting with the input year and month
Usage Syntax: MJDlist(year,month,n) The Modified Julian Date is a continuous count of days since midnight UTC at the beginning of November 17, 1858 (in the Gregorian 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 MJDlist() is entered without any arguments, it prints its description, as shown below.
Examples dv> MJDlist() Returns the Modified Julian Day Numbers corresponding to the first day of each month of the input interval MJDlist(year,month,n) returns 2-by-n-by-1 array of MJDN 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 MJD Numbers Useful for plotting S.Marshall 04-10-2009 0 dv> # For the first day of each month of 2010: dv> MJDlist(2010, 1, 12) 2x12x1 array of float, bsq format [96 bytes] 2010.00000000000 55197.0000000000 2010.08337402344 55228.0000000000 2010.16662597656 55256.0000000000 2010.25000000000 55287.0000000000 2010.33337402344 55317.0000000000 2010.41662597656 55348.0000000000 2010.50000000000 55378.0000000000 2010.58337402344 55409.0000000000 2010.66662597656 55440.0000000000 2010.75000000000 55470.0000000000 2010.83337402344 55501.0000000000 2010.91662597656 55531.0000000000 dv> # For the fifteenth day of each month of 2010: dv> MJDlist(2010, 1, 12) + clone(1./24//14., 1, 12) 2x12x1 array of float, bsq format [96 bytes] 2010.04162597656 55211.0000000000 2010.12500000000 55242.0000000000 2010.20825195312 55270.0000000000 2010.29162597656 55301.0000000000 2010.37500000000 55331.0000000000 2010.45825195312 55362.0000000000 2010.54162597656 55392.0000000000 2010.62500000000 55423.0000000000 2010.70825195312 55454.0000000000 2010.79162597656 55484.0000000000 2010.87500000000 55515.0000000000 2010.95825195312 55545.0000000000 |
DavinciWiki Mini-Nav Bar Contents
Contact Developers
All other topics
Recent Library Changes Created On: 11-18-2009 |
