This video was created for Penn State's EARTH 501 course (https://www.e-education.psu.edu/earth501/) with the assistance of [Eliza ... ... <看更多>

The lubridate package makes it easy to deal with dates. Does this solve your issue? library(lubridate) date <- as. ... <看更多>

I'm trying to calculate the Julian Day, given a UTC year, month and date in the Gregorian calendar. I tried using the formula on Wikipedia, ... ... <看更多>

chinese calendar，通过天文计算和民间推算方法，准确计算出公历-1000年至3000年的 ... Date from and to Julian Day and Day of the week for HP 35s Calculator. ... <看更多>