R语言 | 儒略日与日期互相转换 the conversion between Julian day and year-month-day

基于package modiscloud

library(modiscloud)

简介：

R tools for processing Level 2 Cloud Mask products from MODIS

yearmonthday_to_julianday:
Get the julian day for a year/month/day date

year=2011; month=06; day=15
yearmonthday_to_julianday(year, month, day)
variabledata type
yearas numeric, 4 digits
monthas numeric, 1-2 digits
dayas numeric, 1-2 digits

yearday_to_date:
Convert a year + a day number to a date

yearday_to_date(year=2012, day=364)
# $month
# [1] 12
# $day
# [1] 29
# $year
# [1] 2008
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