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Vumani Dlamini

2004-Mar-25 13:33 UTC

[R] subsetting based on vector

Dear R users;

I am trying to write a small program which reads in a data set, and selects 
observations from certain years before the analysis. I have a problem 
including the selection criteria in the header of the program.

Here is the problem;

dataFIT<-function(MODEL, MARGINS, yearConsidered){
    library(foreign
    CovPaper<-read.spss("C:/Data/data.sav")
    NewData <- list(CovPaper$"YEAR"[CovPaper$"YEAR" ==
yearConsidered],
                          CovPaper$"YEAR"[CovPaper$"SEX" ==
yearConsidered],
                      #### and so on #####
   #fit model to data #
}

When I use one year there is no problem, but I would like some data sets to 
span over years and I am not sure how to do this without having to change 
the body of my fitting program.

I tried searching the R-list but to no avail.

Thanking you in advance.


Vumani

_________________________________________________________________

Vumani Dlamini

2004-Mar-25 14:10 UTC

head link

[R] subsetting based on vector

Thanks man. It did the trick.

Vumani

>From: Winfried Theis <theis at statistik.uni-dortmund.de>
>To: Vumani Dlamini <dvumani at hotmail.com>
>CC: r-help at stat.math.ethz.ch
>Subject: Re: [R] subsetting based on vector
>Date: Thu, 25 Mar 2004 16:16:58 +0100
>
>Hi!
>
>Well, you could try a subsetting rule like " year %in% yearsconsidered
>".
>
>Hope this helps,
>
>Winfried
>On Thu, 2004-03-25 at 14:33, Vumani Dlamini wrote:
> > Dear R users;
> >
> > I am trying to write a small program which reads in a data set, and 
>selects
> > observations from certain years before the analysis. I have a problem
> > including the selection criteria in the header of the program.
> >
> > Here is the problem;
> >
> > dataFIT<-function(MODEL, MARGINS, yearConsidered){
> >     library(foreign
> >     CovPaper<-read.spss("C:/Data/data.sav")
> >     NewData <-
list(CovPaper$"YEAR"[CovPaper$"YEAR" == yearConsidered],
> >                          
CovPaper$"YEAR"[CovPaper$"SEX" ==
>yearConsidered],
> >                       #### and so on #####
> >    #fit model to data #
> > }
> >
> > When I use one year there is no problem, but I would like some data
sets
>to
> > span over years and I am not sure how to do this without having to 
>change
> > the body of my fitting program.
> >
> > I tried searching the R-list but to no avail.
> >
> > Thanking you in advance.
> >
> >
> > Vumani
> >
> > _________________________________________________________________
> >
> > ______________________________________________
> > R-help at stat.math.ethz.ch mailing list
> > https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide! 
>http://www.R-project.org/posting-guide.html
>--
>-----------------------------------------------------------------
>Dr. Dipl.-Math. Winfried Theis, SFB 475, Projekt C5,
>Universität Dortmund, 44221 Dortmund
>e-mail: theis at statistik.uni-dortmund.de
>Tel.: +49/231/755-5903 FAX: +49/231/755-4387
>

Winfried Theis

2004-Mar-25 15:16 UTC

head link

[R] subsetting based on vector

Hi!

Well, you could try a subsetting rule like " year %in% yearsconsidered
".

Hope this helps,

Winfried
On Thu, 2004-03-25 at 14:33, Vumani Dlamini wrote:> Dear R users;
> 
> I am trying to write a small program which reads in a data set, and selects
> observations from certain years before the analysis. I have a problem 
> including the selection criteria in the header of the program.
> 
> Here is the problem;
> 
> dataFIT<-function(MODEL, MARGINS, yearConsidered){
>     library(foreign
>     CovPaper<-read.spss("C:/Data/data.sav")
>     NewData <- list(CovPaper$"YEAR"[CovPaper$"YEAR"
== yearConsidered],
>                          
CovPaper$"YEAR"[CovPaper$"SEX" == yearConsidered],
>                       #### and so on #####
>    #fit model to data #
> }
> 
> When I use one year there is no problem, but I would like some data sets to
> span over years and I am not sure how to do this without having to change 
> the body of my fitting program.
> 
> I tried searching the R-list but to no avail.
> 
> Thanking you in advance.
> 
> 
> Vumani
> 
> _________________________________________________________________
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html-- 
-----------------------------------------------------------------
Dr. Dipl.-Math. Winfried Theis, SFB 475, Projekt C5,
Universit?t Dortmund, 44221 Dortmund
e-mail: theis at statistik.uni-dortmund.de
Tel.: +49/231/755-5903 FAX: +49/231/755-4387

Don MacQueen

2004-Mar-25 15:53 UTC

head link

[R] subsetting based on vector

Since you are interested in subsetting, a little search of the online 
help such as

    help.search('subset')

will reveal the subset() function. Which you could use, for example, like this:

dataFIT<-function(MODEL, MARGINS, yearConsidered){
    library(foreign
    CovPaper<-read.spss("C:/Data/data.sav")
    NewData <- subset(CovPaper, YEAR %in% yearConsidered)

   #fit model to data #
}

If you truly need NewData to be a list, use as.list(). Also, within 
the context of your example, you don't need all the quotes; you can 
use CovPaper$YEAR instead of CovPaper$"YEAR".

Also check the documentation of the function(s) you are using to fit 
the model(s) for a subset argument; that might be sufficient for your 
needs.

-Don

At 1:33 PM +0000 3/25/04, Vumani Dlamini wrote:>Dear R users;
>
>I am trying to write a small program which reads in a data set, and 
>selects observations from certain years before the analysis. I have 
>a problem including the selection criteria in the header of the 
>program.
>
>Here is the problem;
>
>dataFIT<-function(MODEL, MARGINS, yearConsidered){
>    library(foreign
>    CovPaper<-read.spss("C:/Data/data.sav")
>    NewData <- list(CovPaper$"YEAR"[CovPaper$"YEAR"
== yearConsidered],
>                          CovPaper$"YEAR"[CovPaper$"SEX"
== yearConsidered],
>                      #### and so on #####
>   #fit model to data #
>}
>
>When I use one year there is no problem, but I would like some data 
>sets to span over years and I am not sure how to do this without 
>having to change the body of my fitting program.
>
>I tried searching the R-list but to no avail.
>
>Thanking you in advance.
>
>
>Vumani
>
>_________________________________________________________________
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>https://www.stat.math.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html

-- 
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA

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