Jeff,
Thanks for the hint. It is a good solution.
Thanks!
From: Jeff Newmiller [mailto:jdnew...@dcn.davis.ca.us]
Sent: Thursday, July 21, 2011 7:00 PM
To: Hu, Yinghua; r-help@r-project.org
Subject: Re: [R] Summing daily values by weekday and weekend
Clue: make a column representing the desired
Clue: make a column representing the desired classification, and then use any
of the methods you considered to do the summarizing.
One possible approach:
myframe$wend <- as.factor(ifelse(weekday( myframe$dates) %in%
c("Saturday","Sunday"), "Weekend", "Weekday"))
(Sorry for reposting. Please delete previous msgs. Thanks!)
Hi, all
Here I created a data frame like
mydates<- seq(as.Date("2010-05-29"), length = 43, by = "day")
myvalues<-runif(43,0,1)
myframe<-data.frame(dates=mydates, day=weekdays(dates), value=myvalues)
dates day valu
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