AW: position of matrix elements for intervals
- To: mathgroup at smc.vnet.net
- Subject: [mg78449] AW: [mg78426] position of matrix elements for intervals
- From: "Kristoph Steikert" <kristophs.post at web.de>
- Date: Mon, 2 Jul 2007 06:46:42 -0400 (EDT)
Thanks a lot, this was helpful! But it seems that I have an extended problem
and I would kindly ask for your help.
Do you have an idea how to allocate the position of the first element
satisfying the condition of each column from below?
Example:
data = {{1, 1.`, 0.9999999932328848`}, {1.`, 0.9985849617864345`,
3.7570598417296495`*^-108}, {0.9999999999267634`,
4.0643593704937925`*^-207, 0}};
I'm looking for the position from below of the first element in each column
meeting #>=0.99.
The output should be:
{{1,3},{2,2},{3,1}}
I appreciate your help very much,
Kristoph
-----Urspr=FCngliche Nachricht-----
Von: hanlonr at cox.net [mailto:hanlonr at cox.net]
Gesendet: Sonntag, 1. Juli 2007 17:05
An: kristoph; mathgroup at smc.vnet.net
Betreff: Re: [mg78426] position of matrix elements for intervals
data = {{1, 1.`, 0.9999999932328848`}, {1.`, 0.9985849617864345`,
3.7570598417296495`*^-108}, {0.9999999999267634`,
4.0643593704937925`*^-207, 0}};
The second argument to Position must be written as a pattern:
Position[data, _?(# >= 0.99 &)]
{{1, 1}, {1, 2}, {1, 3}, {2, 1},
{2, 2}, {3, 1}}
Position[data, _?(0.4 <= # <= 0.9999 &)]
{{2, 2}}
Bob Hanlon
---- kristoph <kristophs.post at web.de> wrote:
> Hi,
>
> Assume you have the following table:
>
> {{1, 1.`, 0.9999999932328848`}, {1.`, 0.9985849617864345`,
> 3.7570598417296495`*^-108}, {0.9999999999267634`,
> 4.0643593704937925`*^-207, 0}}
>
> I would like the position of all the elements >= 0.99. Or the position
> of all the elements of [0.4, 0.9] which in the above table does make a
> lot of sense.
> I'm familiar with Position[...,.] but since I look for reals of an
> interval I would kindly ask for help.
>
> Thanks a lot,
> Kristoph
>
>