[R] problem with dates in zoo package
cjrubio at kongju.ac.kr
Tue Feb 17 09:58:56 CET 2009
i have the following code - assimilating the maximum annual discharge each
year ffrom a daily discharge record from year 1989-2005.
m <- read.table("D:/documents/5 stations/01014000.csv", sep =",")
z <- zoo(m[,4],as.Date(as.character(m[,3]), "%m/%d/%Y"))
x <- aggregate(z, floor(as.numeric(as.yearmon(time(z)))), max) #code
suggested by Gabor Grothendieck
which gives me the maximum discharge each year and the year itself.. what i
am trying now is to produce the date when the maximum discharge was observed
in the pattern yyyy-mm-dd, like:
1988 11/9/1988 18600
1989 5/8/1989 49000
2005 4/26/2005 111000
thank you all in advance...
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