[R] Compressing code help in a loop

PIKAL Petr petr.pikal at precheza.cz
Wed Nov 12 11:08:28 CET 2014


Hi

slightly more general if first number is quarter and last two are year

> index <- c(406, 107, 207, 307, 407, 108, 208, 308, 408, 109, 209, 309, 409,
+ 110, 210, 310, 410, 111, 211)

year<-substr(as.character(index), 2,3)
qrt<-substr(as.character(index), 1,1)
as.numeric(factor(paste(year, qrt, sep="-")))
 [1]  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19

qyTOindex <- function(x) {

year <- substr(as.character(x), 2,3)
qrt <- substr(as.character(x), 1,1)
result <-as.numeric(factor(paste(year, qrt, sep="-")))
}

qyTOindex(p_int$p_made)

Regards

Petr

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Wush Wu
> Sent: Monday, November 10, 2014 2:30 PM
> To: Francesca
> Cc: R help
> Subject: Re: [R] Compressing code help in a loop
>
> Dear Francesca,
>
> Is this what you want?
>
> ```r
> index <- c(406, 107, 207, 307, 407, 108, 208, 308, 408, 109, 209, 309,
> 409,
> 110, 210, 310, 410, 111, 211)
> p_m <- match( p_int$p_made, index)
> dim(p_m) <- c(dim(p_int)[1],1)
> ```
>
> Best,
> Wush
> PhD Student Graduate Institute of Electrical Engineering, National
> Taiwan
> University
>
>
>
> 2014-11-10 20:14 GMT+08:00 Francesca <francesca.pancotto at gmail.com>:
>
> > Dear Contributors
> >
> > I have a problem with a loop.
> >
> > I needed to create a variable that takes values 1,2.. to 19
> corresponding
> > to the value of a variable in a data.frame whose name is p_int$p_made
> and
> >
> > which takes values from 406  to 211.
> >
> > The problem is that this values come ordered in the wrong way when I
> try to
> > compress the loop as the system reads
> >
> >
> > 107,111,207,211,311,406,407,408,409,410,411,
> >
> >
> > while they correspond to quarters-years so they should be ordered as
> >
> >
> > 406-107-207-307-407…
> >
> > the only solution I found was really silly. It is the following.
> >
> >
> >
> >
> > p_m<-matrix(0,dim(p_int)[1],1)
> >
> > for (i in 1:length(p_int$p_made)){
> >
> >   if (p_int$p_made[i]==406) p_m[i]<-1 else
> >
> >     if (p_int$p_made[i]==107) p_m[i]<-2 else
> >
> >       if (p_int$p_made[i]==207) p_m[i]<-3 else
> >
> >         if (p_int$p_made[i]==307) p_m[i]<-4 else
> >
> >           if (p_int$p_made[i]==407) p_m[i]<-5 else
> >
> >             if (p_int$p_made[i]==108) p_m[i]<-6 else
> >
> >               if (p_int$p_made[i]==208) p_m[i]<-7 else
> >
> >                 if (p_int$p_made[i]==308) p_m[i]<-8 else
> >
> >                   if (p_int$p_made[i]==408) p_m[i]<-9 else
> >
> >                     if (p_int$p_made[i]==109) p_m[i]<-10 else
> >
> >                       if (p_int$p_made[i]==209) p_m[i]<-11 else
> >
> >                         if (p_int$p_made[i]==309) p_m[i]<-12 else
> >
> >                           if (p_int$p_made[i]==409) p_m[i]<-13 else
> >
> >                             if (p_int$p_made[i]==110) p_m[i]<-14 else
> >
> >                               if (p_int$p_made[i]==210) p_m[i]<-15
> else
> >
> >                                 if (p_int$p_made[i]==310) p_m[i]<-16
> else
> >
> >                                   if (p_int$p_made[i]==410) p_m[i]<-
> 17 else
> >
> >                                     if (p_int$p_made[i]==111)
> p_m[i]<-18
> > else
> >
> >                                       if (p_int$p_made[i]==211)
> p_m[i]<-19
> >
> > }
> >
> > Can anyone help to find something more efficient?
> >
> >
> > Thanks in advance.
> >
> >
> > Francesca
> >
> > --
> >
> > Francesca
> >
> > ----------------------------------
> > Francesca Pancotto
> > Associate Professor
> > University of Modena and Reggio Emilia
> > Viale A. Allegri, 9
> > 40121 Reggio Emilia
> > Office: +39 0522 523264
> > Web: https://sites.google.com/site/francescapancotto/
> > ----------------------------------
> >
> >         [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help at 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.
> >
>
>       [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at 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.

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