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RE: st: programming help


From   "Alexandru Voicu" <voicu@iza.org>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: programming help
Date   Tue, 22 Feb 2005 14:55:54 +0100

Not really. If the ordering is important, you can attach a rank vector
to result matrix result = rank~X, sort it according to the elements of
x, then do the whole thing for the second column of the result matrix,
then resort it with respect to its first column.

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Seb Buechte
Sent: Tuesday, February 22, 2005 2:51 PM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: programming help


I am wondering: do you need to preserve the order of elements in your
vector(s)? In that case sorting etc. will not help and the whole problem
remains more complex...

seb


On Tue, 22 Feb 2005 07:58:17 -0500, MITRA PINAKI  (MAR1PXM)
<mar1pxm@ups.com> wrote:
> Dear all,
> 
>     I am struggling with the following problem and wondering if I can 
> get any help on this. I have two row vectors, X=(x11, x21, x31, ..., 
> xn1)' and Y=(y11, y21, y31, ..., yn1)' where n=300 (I have 300 
> elements in each of the row vectors). My problem is the following: 1) 
> I need to calculate the largest value of Y and the smallest value of 
> X. 2) If the largest value of Y is grater than the smallest value of 
> X, replace the smallest value of X by the largest value of Y. 3) At 
> the next step, ignore the previous largest value of Y and find the 
> largest from the rest of the 299 elements of Y. Also for X, find the 
> smallest value of X from the rest of the 299 elements of X and if the 
> largest value of Y is grater than the smallest value of X, replace the

> smallest value of X by the largest value of Y. 4) The loop stops when 
> the largest value of Y from the rest of Y elements is less than equal 
> to the smallest value of X from the rest of X elements. 5) Construct 
> the new X vector (X_NEW) with the new elements of Y after replacement 
> keeping the unchanged elements of X.
> 
> My problem is that I am not able to construct the loop correctly and 
> getting no where. Thank you for your help.
> 
> Pinaki
> 
> _____________________________
> Pinaki Mitra
> UPS Capital
> 35 Glenlake Parkway, NE
> Atlanta, GA 30345
> Office: (404) 828-6759; 5-490-6759 (UPS Atlas)
> Fax:    (404) 828-6660
> Cell:   (404) 668-6575
> Web:   www.upscapital.com
> 
> *
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> 


-- 
- Seb F Buechte
-
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