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monthday

Calculates a concatenated month_day given a day and year.

Prototype

	function monthday (
		year  : integer,  
		day   : integer   
	)

	return_val [dimsizes(year)] :  integer

Arguments

year

A multi-dimensional integer array or scalar value representing years. Values must be >= 0.

day

An integer array of the same size as year representing days of the year. Values must be 1 to 366.

Return value

An integer array of the same size as year. Each value represents the concatenated month and day.

Description

Calculates a concatenated month_day given arrays of years and days.

In V6.1.0, this function was upgraded to look for a "calendar" attribute attached to the "year" variable. Valid calendars include:

  • "standard" (the default)
  • "gregorian"
  • "julian"
  • "360_day", "360"
  • "365_day", "365"
  • "366_day", "366"
  • "noleap", "no_leap"
  • "allleap", "all_leap"
  • "none"
Also in V6.1.0, this function was upgraded to recognize missing values.

See Also

day_of_year, day_of_week, days_in_month, isleapyear

Examples

Example 1 

  year = (/1933,1996,1997,1996/)
  day  = (/ 245, 366, 365,  61/)
  md = monthday(year,day)  ; md = (/902,1231,1231,301/)
Example 2

This example shows how to use the new "calendar" attribute, which was added in NCL version 6.1.0. 

  year = (/1933,1996,1997,1996/)
  day  = (/ 245, 366, 365,  61/)

  year@calendar = "standard"
  md = monthday(year,day)  ; md = (/902,1231,1231,301/)

  year@calendar = "allleap"
  md = monthday(year,day)  ; md = (/902,1231,1230,301/)

  day  = (/ 245, 365, 365,  61/)     ; can't use any values > 365
  year@calendar = "noleap"
  md = monthday(year,day)  ; md = (/902,1231,1231,302/)

  day  = (/ 245, 360, 359,  61/)     ; can't use any values > 360
  year@calendar = "360"
  md = monthday(year,day)  ; md = (/905,1230,1229,301/)