search for: tfact

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2009 Aug 18
1
Applying Logical statement to DateTime string as factor
...ime), function(x) strsplit(x," "))),ncol=4, byrow=TRUE) #Break Time String into columns colnames(new.dates) <- c("day","month","year", "time") # Set column names dat <- cbind(as.data.frame(new.dates), as.data.frame(dat)) #bind to data frame tfact<-matrix() for (i in which(as.character(dat$time) <= "12:00:00")){ tfact[i] <- "Morning" } for (i in which(as.character(dat$time) >= "12:00:00")){ tfact[i] <- "Night" } tfact<-factor(tfact, levels=c("Morning",...