Displaying 1 result from an estimated 1 matches for "xandaynight".
2013 Jun 10
1
modify and append new rows to a data.frame using ddply
...time=sunset
[i+2]?01-01-2000 21:01:00 , 30 # previously row i+1th
[i+3]?01-01-2000 21:01:30 , 30 # previously row i+2th
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I attach a dput with a selection of my data.frame. Here is a piece of existing code that I am trying to adapt just for the daytime/night time change:
? require(plyr)
? xandaynight <- ddply( xan, .(Ring), function(df1){
? # index of day/night changes
? ind <- c( FALSE, diff(df$dif) == 1 )
? add <- df1[ind,]
? add$timepos <- add$dusk
? # rearrangement
? df1 <- rbind( df1, add )
? df1 <- df1[order(df1$timepos),]
? # recalculation of act
? df1$act2 <- c( dif...