HI Rui,
For some reason, I am not getting the result as expected.
date1
#[1] "24/04/2009"
date2
#[1] "27/04/2009"
extraction(dat,date1,date2,format="%Y-%m-%d")
#[1] DATE PAYS x
#<0 rows> (or 0-length row.names)
#Warning messages:
#1: In extraction(dat, date1, date2, format = "%Y-%m-%d") :
# Incompatible methods ("Ops.Date", "Ops.factor") for "<"
#2: In extraction(dat, date1, date2, format = "%Y-%m-%d") :
# Incompatible methods ("Ops.factor", "Ops.Date") for "<"
extraction(dat,"24/04/2009","27/04/2009",format="%Y-%m-%d")
#[1] DATE PAYS x
#<0 rows> (or 0-length row.names)
#Warning messages:
#1: In extraction(dat, "24/04/2009", "27/04/2009", format = "%Y-%m-%d") :
I tried with my function:
fun1<-function(dat,date1,date2){
date1new<-as.Date(date1,format="%d/%m/%Y")
date2new<-as.Date(date2,format="%d/%m/%Y")
dat[,1]<-as.Date(dat$DATE,format="%d/%m/%Y")
res1<-with(dat,aggregate(nb_pays.ILI.,by=list(DATE,PAYS),sum))
names(res1)<-names(dat)
res2<-res1[res1[,1]>=date1new & res1[,1] <=date2new,]
res2<-res2[order(res2[,1],res2[,2]),]
#res2[,1]<-as.POSIXct(res2[,1]) #if you want to convert to as.POSIXct()
rownames(res2)<-1:nrow(res2)
res2}
fun1(dat,date1,date2)
# DATE PAYS nb_pays.ILI.
#1 2009-04-24 Mexique 0
#2 2009-04-24 usa 0
#3 2009-04-26 Mexique 18
#4 2009-04-26 usa 100
#5 2009-04-27 Canada 6
#6 2009-04-27 Mexique 26
#7 2009-04-27 Spain 1
#8 2009-04-27 usa 40
A.K.
From: Rui Barradas <ruipbarra...@sapo.pt>
To: anoumou <teko_maur...@yahoo.fr>
Cc: r-help@r-project.org
Sent: Saturday, November 10, 2012 12:17 PM
Subject: Re: [R] help on date dataset
Hello,
Sorry, forgot the sum part.
extraction <- function(DF, date1, date2, format = "%Y-%m-%d"){
date1 <- as.Date(date1, format)
date2 <- as.Date(date2, format)
idx <- date1 < DF[[1]] & DF[[1]] < date2
aggregate(DF[idx, 3], DF[idx, 1:2], FUN = sum)
}
Hope this helps,
Rui Barradas
Em 10-11-2012 17:13, Rui Barradas escreveu:
> Hello,
>
> If I understand it correctly, you have a data.frame whose first column is a
> date and want to extract all lines between two given dates. If so, try the
> following. Note that I've added two new arguments to your function.
>
> dat <- read.table(text="
> DATE PAYS nb_pays.ILI.
> 1 24/04/2009 usa 0
> 2 24/04/2009 usa 0
> 3 24/04/2009 Mexique 0
> 4 24/04/2009 Mexique 0
> 5 26/04/2009 usa 20
> 6 26/04/2009 usa 20
> 7 26/04/2009 usa 20
> 8 26/04/2009 usa 20
> 9 26/04/2009 usa 20
> 10 26/04/2009 Mexique 18
> 11 27/04/2009 usa 40
> 12 27/04/2009 Mexique 26
> 13 27/04/2009 Canada 6
> 14 27/04/2009 Spain 1
> 15 28/04/2009 Canada 6
> ", header = TRUE)
>
> dat
> dat$DATE <- as.Date(dat$DATE, format = "%d/%m/%Y")
>
> extraction <- function(DF, date1, date2, format = "%Y-%m-%d"){
> date1 <- as.Date(date1, format)
> date2 <- as.Date(date2, format)
> idx <- date1 < DF[[1]] & DF[[1]] < date2
> DF[idx, ]
> }
>
> date1 <- "04 03 2009"
> date2 <- "04 12 2009"
> extraction(dat, date1, date2, format = "%d %m %Y")
>
>
> Hope this helps,
>
> Rui Barradas
> Em 10-11-2012 13:21, anoumou escreveu:
>> Hi everybody,
>> I am beginer in R and I need your precious help.
>> I want to create a small function in R as in sas to retrieve date.
>> I have a file with data that import in R.
>> DATE PAYS nb_pays.ILI.
>> 1 24/04/2009 usa 0
>> 2 24/04/2009 usa 0
>> 3 24/04/2009 Mexique 0
>> 4 24/04/2009 Mexique 0
>> 5 26/04/2009 usa 20
>> 6 26/04/2009 usa 20
>> 7 26/04/2009 usa 20
>> 8 26/04/2009 usa 20
>> 9 26/04/2009 usa 20
>> 10 26/04/2009 Mexique 18
>> 11 27/04/2009 usa 40
>> 12 27/04/2009 Mexique 26
>> 13 27/04/2009 Canada 6
>> 14 27/04/2009 Spain 1
>> 15 28/04/2009 Canada 6
>>
>> I want to create something like that:
>> • When entering two dates date1,date2 in the fuction extraction.
>> The result must be: a new subdata with one line per date , per PAYS,per
>> nb_pays.ILI (by summing all the number in variable nb_pays.ILI per date,per
>> country) and the date must be between date1 and date2.
>> I sart to do somethings like that
>> extraction=function(date1,date2)
>> {date<-derdata[["DATE"]]
>> date
>> sort(date)
>> PAYS<-derdata[["PAYS"]]
>> nb_pays.ILI<-derdata[["nb_pays.ILI."]]
>> test1<-as.character(date,"%d %m %y")
>> test1
>> #the first date
>> date1<- "04 03 2009"
>> date1 <- strptime(date1, "%d %m %Y")
>> date1
>> unlist(unclass(date1))
>> date1 <- as.POSIXct(date1)
>> date1
>> attributes(date1)
>> date1 <-unclass(date1)
>> date1
>> #the second date
>> date2<- "04 12 2009"
>> date2 <- strptime(date2, "%d %m %Y")
>> date2
>> unlist(unclass(date2))
>> date2 <- as.POSIXct(date2)
>> date2
>> attributes(date2)
>> date2 <-unclass(date2)
>> date2
>> B1<- as.POSIXct(test1)
>> B1 <-unclass(B1)
>> B1
>> B4 <- B1[(B1>date1) & (B1<date2)]
>> B4
>> }
>>
>>
>>
>>
>> -- View this message in context:
>> http://r.789695.n4.nabble.com/help-on-date-dataset-tp4649175.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
>> ______________________________________________
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
