HI,
I guess this is what you are looking for:
merge(myframe2,environ2, by="ID")
# ID Hunger myframestime Temp Rain envirotime
#1 Bert 2 2012-09-24 10:00:00 27 2 2012-09-25 10:00:00
#2 Bert 2 2012-09-25 10:00:00 27 2 2012-09-25 10:00:00
#3 Ernie 1 2012-09-24 09:00:00 25 0.1 2012-09-24 09:00:00
#4 Ernie 1 2012-09-24 09:00:00 30 5 2012-09-25 09:00:00
#5 Ernie 1 2012-09-25 09:00:00 25 0.1 2012-09-24 09:00:00
#6 Ernie 1 2012-09-25 09:00:00 30 5 2012-09-25 09:00:00
A.K.
----- Original Message -----
From: Tagmarie <ramga...@gmx.net>
To: r-help@r-project.org
Cc:
Sent: Tuesday, September 25, 2012 10:44 AM
Subject: [R] add a data frame to my data frame
Hello,
Once again I feel so dumb. Can anyone help me?
I have a data frame somewhat like that:
myframe <- data.frame (ID=c("Ernie", "Ernie", "Bert", "Bert"),
Timestamp=c("24.09.2012 09:00", "25.09.2012 09:00", "24.09.2012 10:00",
"25.09.2012 10:00"), Hunger=c("1","1","2","2") )
myframestime <- as.POSIXct (strptime(as.character(myframe$Timestamp),
"%d.%m.%Y %H:%M"), tz="GMT")
myframe2 <- cbind (myframe,myframestime)
myframe2$Timestamp <- NULL
Now I have a second dataframe with environmental variables. Something like
this:
environ <- data.frame (ID=c("Ernie", "Ernie", "Bert"),
Timestamp=c("24.09.2012 09:00", "25.09.2012 09:00", "25.09.2012 10:00"),
Temp=c("25","30","27"), Rain =c ("0.1", "5", "2"))
envirotime <- as.POSIXct (strptime(as.character(environ$Timestamp),
"%d.%m.%Y %H:%M"), tz="GMT")
environ2 <- cbind (environ,envirotime)
environ2$Timestamp <- NULL
How do I merge or handle the two data frames at the respective lines so that
I get the data (Temp, Rain) at the correct line with (Hunger)?
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