[R] R and SAS proc format

[Peter Dalgaard]

Jason Barnhart wrote:
> ----- Original Message ----- 
> From: "John Kane" <jrkrideau at yahoo.ca>
> To: "lamack lamack" <lamac_k at hotmail.com>; <R-help at stat.math.ethz.ch>
> Sent: Tuesday, March 06, 2007 2:13 PM
> Subject: Re: [R] R and SAS proc format
>
>
>   
>> --- lamack lamack <lamac_k at hotmail.com> wrote:
>>
>>     
>>> Dear all, Is there an R equivalent to SAS's proc
>>> format?
>>>       
>> What does the SAS PROC FORMAT do?
>>     
>
> It formats or reformats data in the SAS system.
>   

Slightly more precisely: It creates user-defined formats, which are
subsequently associated with variables and used for reading, printing,
tabulating, and analyzing data. It is akin to R's factor()
constructions, but not quite. For one thing, SAS's formats are separate
entities - same format can be used for many variables, whereas R's
factors have the formatting coded as a part of the object. For related
reasons, a variable in SAS can have more distinct values than there are
value labesl for, etc. 
> It looks this:
>
>     proc format; value kanefmt 1='A' 2='B' 3='C' 4='X' 5='Throw me 
> out';
>     data temp; do i=1 to 10; kanevar=put(i,kanefmt.); output; end;
>     proc print; run;
>
> And produces this:
>
> Obs     i      kanevar
>   1     1    A
>   2     2    B
>   3     3    C
>   4     4    X
>   5     5    Throw me out
>   6     6               6
>   7     7               7
>   8     8               8
>   9     9               9
>  10    10              10
>
>
> But it is more robust than what is shown here.
>
>
>
>   
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>> and provide commented, minimal, self-contained, reproducible code.
>>
>>     
>
> ______________________________________________
> R-help at stat.math.ethz.ch 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.
>   


-- 
   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)                  FAX: (+45) 35327907