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given julian day and year get month/day
fromjul(jul, yy)
Julian Day
year
list(mo=mm, dom=dd)
tojul
# NOT RUN { iyear <- 2001 jul <- 233 inine <- tojul(iyear,1,1); ijul <- inine + jul - 1; fromjul( ijul, iyear); # }
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