RE: [R] aggregate

From: bogdan romocea <br44114_at_gmail.com>
Date: Thu 12 May 2005 - 06:06:31 EST


Assuming dfr["day","o","h","l","c"] and day like 2004-12-28: dt <- strptime(as.character(dfr$day),format="%Y-%m-%d") + 0 wk <- format(dt,"%Yw%U")
aggr <- aggregate(list(dfr$o,dfr$h,dfr$l,dfr$c),list(wk),mean) colnames(aggr) <- etc

-----Original Message-----
From: Omar Lakkis [mailto:uofiowa@gmail.com] Sent: Wednesday, May 11, 2005 3:45 PM
To: r-help@stat.math.ethz.ch
Subject: [R] aggregate

I have a data frame of daily open, high, low and settle prices. How can I aggregate this data weekly?
The data frame has five columns, the first is the date column and the rest are the prices.



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R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu May 12 06:12:05 2005

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