Works fine for me:

> x
     gene_id    predict
43 637882902 0.07823997
53 638101634 0.66256490
61 639084581 0.08587504
41 637832824 0.02461066
25 637261662 0.11613879
22 637240022 0.06350477
62 639084582 0.02238538
63 639097718 0.06792841
44 637943079 0.04532625
80 640158389 0.06582658
3  637006517 0.57648451
49 638072100 0.01391633
4  637007046 0.08999928
13 637047086 0.01493464
74 639787397 0.01283783
58 638936569 0.29182988
24 637261661 0.02561841
59 639006028 0.31732711
38 637585227 0.31272531
35 637399473 0.10687524
> x[order(-x$predict),]
     gene_id    predict
53 638101634 0.66256490
3  637006517 0.57648451
59 639006028 0.31732711
38 637585227 0.31272531
58 638936569 0.29182988
25 637261662 0.11613879
35 637399473 0.10687524
4  637007046 0.08999928
61 639084581 0.08587504
43 637882902 0.07823997
63 639097718 0.06792841
80 640158389 0.06582658
22 637240022 0.06350477
44 637943079 0.04532625
24 637261661 0.02561841
41 637832824 0.02461066
62 639084582 0.02238538
13 637047086 0.01493464
49 638072100 0.01391633
74 639787397 0.01283783
>
I would check your data.  Do 'str()' on the data.

On Wed, May 5, 2010 at 12:31 PM, Changbin Du <changbind@gmail.com> wrote:

> > #sort the data by predicted probability
> > b.order<-bo.id.pred[(order(-predict)),]
> > b.order[1:20,]
>     gene_id    predict
> 43 637882902 0.07823997
> 53 638101634 0.66256490
> 61 639084581 0.08587504
> 41 637832824 0.02461066
> 25 637261662 0.11613879
> 22 637240022 0.06350477
> 62 639084582 0.02238538
> 63 639097718 0.06792841
> 44 637943079 0.04532625
> 80 640158389 0.06582658
> 3  637006517 0.57648451
> 49 638072100 0.01391633
> 4  637007046 0.08999928
> 13 637047086 0.01493464
> 74 639787397 0.01283783
> 58 638936569 0.29182988
> 24 637261661 0.02561841
> 59 639006028 0.31732711
> 38 637585227 0.31272531
> 35 637399473 0.10687524
>
>
>
> HI, Dear R community,
>
> I am sorting the data set bo.id.pred by variable predict, why it does not
> work?  The sequence changed compared with original data set, but you can
> not
> read any descending pattern.
>
> Thanks!
>
> --
> Sincerely,
> Changbin
> --
>
>        [[alternative HTML version deleted]]
>
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html<http://www.r-project.org/posting-guide.html>
> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?

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