On Tue, 5 Oct 2004, Khamenia, Valery wrote:
BTW, do you mean that current hash-based implementation brings *clearly*
better performance than any O(n*log(n)) sort based algorithm?
If I have correctly understood src/main/unique.c then current
hash function is niether minimal perfect hash function nor
> Please follow the posting guide and do your homework before
> posting,
1. my last homework in university was done a lot of years ago.
2. I always try to follow posting guide.
> An object of the same type of 'x'. but if an element is equal to
> one with a smaller index, it is remov
On 4 Oct 2004 at 15:27, Khamenia, Valery wrote:
> Hi Petr,
>
> Thank you for your reply.
>
> > Factor <- function(f,n, decreasing=TRUE, ...) {
> > ooo<-order(levels(factor(n)), decreasing=decreasing)
> > my.order<-levels(factor(f))[ooo]
> > factor(f, levels=my.order)
> > }
>
> it works incorr
On Mon, 4 Oct 2004, Khamenia, Valery wrote:
> Hi Dimitris,
>
> thank you for your reply,
>
> > does the following work in your data:
> >
> > levs <- unique.default(Names)
> > factor(Names, levs[order(unique.default(Weights))])
>
> your solution is really shorter, but has two issues to be
> m
Hi Petr,
Thank you for your reply.
> Factor <- function(f,n, decreasing=TRUE, ...) {
> ooo<-order(levels(factor(n)), decreasing=decreasing)
> my.order<-levels(factor(f))[ooo]
> factor(f, levels=my.order)
> }
it works incorrectly. Indeed, let's apply with your Factor:
unames <- c("thousands",
Hi Dimitris,
thank you for your reply,
> does the following work in your data:
>
> levs <- unique.default(Names)
> factor(Names, levs[order(unique.default(Weights))])
your solution is really shorter, but has two issues to be
meant here:
1. "unique.default" is applied twice, what might
be
On 4 Oct 2004 at 12:01, Khamenia, Valery wrote:
> Hi all,
>
> my colleagues deal with tables, where every factor is
> represented in two columns. The first column contains some
> numeric codes and the second contains the corresponding
> symbolic name. For example:
>
> ISEX SSEX
> 0 Fem
nday, October 04, 2004 12:01 PM
Subject: [R] constructing specially ordered factor
Hi all,
my colleagues deal with tables, where every factor is
represented in two columns. The first column contains some
numeric codes and the second contains the corresponding
symbolic name. For example:
ISEX SSEX
0
Hi all,
my colleagues deal with tables, where every factor is
represented in two columns. The first column contains some
numeric codes and the second contains the corresponding
symbolic name. For example:
ISEXSSEX
0 Female
1 Male
0 Female
0 Female
...
another examp
