Re: [R] loop with date

2012-11-27 Thread Tagmarie
Sorry again, project is part of the rgdal package. Tagmarie -- View this message in context: http://r.789695.n4.nabble.com/loop-with-date-tp4650961p4651005.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing

Re: [R] loop with date

2012-11-27 Thread Tagmarie
Ok, sorry, I thought the more complex details might be confusing and nobody might answer. Here is something which looks more like my real dataframe and also what I want to do with it: That's my data frame: myframe <- data.frame (Timestamp=c("24.09.2012 09:00", "24.09.2012 10:00", "24.09.2012 1

Re: [R] loop with date

2012-11-27 Thread arun
HI, If you want to do daily mean, sum etc. you could try ?tapply(), ?ave(), ?aggregate(), ?ddply() etc. For e.g.  ave(myframe2$Speed,as.Date(myframe2$myframestime),FUN=sum) #[1]  4  4  4 12 12 12 tapply(myframe2$Speed,as.Date(myframe2$myframestime),FUN=mean) #2012-09-24 2012-09-25  # 1.33   4.

Re: [R] loop with date

2012-11-27 Thread jim holtman
Here is an example of an approach: > myframe <- data.frame (Timestamp=c("24.09.2012 09:00", "24.09.2012 10:00", + "24.09.2012 11:00", +"25.09.2012 09:00", "25.09.2012 10:00", + "25.09.2012 11:00"), + Speed=c(1,1,2,5,1,6)) > myframestime <

Re: [R] loop with date

2012-11-27 Thread R. Michael Weylandt
On Tuesday, November 27, 2012, Tagmarie wrote: > Hello, > I tried to construct my very first loop today and completly failed :-( > Maybe someone can help me? > I have a dataframe somewhat like this one: > > myframe <- data.frame (Timestamp=c("24.09.2012 09:00", "24.09.2012 10:00", > "24.09.2012 11