Re: [eigen] refactoring fork: some news |

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*To*: eigen@xxxxxxxxxxxxxxxxxxx*Subject*: Re: [eigen] refactoring fork: some news*From*: Benoit Jacob <jacob.benoit.1@xxxxxxxxx>*Date*: Sun, 20 Dec 2009 18:22:00 -0500*Dkim-signature*: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type :content-transfer-encoding; bh=pBVp5OTWN30lUdZTpEjcJt7QWl57k5yikXAYAw2YU6k=; b=ipDXDrli0Wfnyn4gkt2Smx+Niag3DeaQknjVdbVwHkkAdeRMPg1aBHu1pQ6Ah4rSMd CDTSozCa9sVv55skaEsf4spb9mqi1BY+vb4fOvb34ihgMULiD4pjtp8y8h59A3MvkvLx RMam38quC74AD17zFjsJuziHONxHqsJH6WGYw=*Domainkey-signature*: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; b=vEr5mLOfgYjkyF/UBugoWTDdjcJKYZkLQdEJmFyHrdfERSue8qEAEAMMFsvsmKz1Aa K/XejyKiGUEPEu906ATsxzTl+CzU9/XrGbAbXTVo0Orfj6c5sC7w7kKTSEMOacOmzj6X 6wnkB+DH93YTFZHunqGQPDhGDgvFkawxaPTLQ=

huh, 3 people already have this need? ok, i'll code it then... it's just 3 lines of code... 2009/12/20 Thomas Capricelli <orzel@xxxxxxxxxxxxxxx>: > > I'm kind of having this need too. I'm writing algorithms where the matrices operate on a vector x, which is an image. As such, it sometimes need to be seen as a mxn array (not exactly a matrix), but most of the time it really is just a vector. > > Examples of when it needs to be seen as an array is representation (transformation to a QImage) or computing the FFT (as a 2d object). > > ++ > -- > Thomas Capricelli <orzel@xxxxxxxxxxxxxxx> > http://www.freehackers.org/thomas > > In data domenica 20 dicembre 2009 18:04:03, Manuel Yguel ha scritto: > : > Hi, >> I am practically sure that it is off the point however my concern is >> that in some applications, it is necessary to view a matrix of size >> nxm as a vector 1xnm or pxq with nm = pq. >> I wonder if this is the good moment to raise my case, but is this >> possible to consider having a matrix() function that takes two >> parameters that are compatible with the number of coefficients in the >> array: matrix(int rows, int cols ) with rows*cols = size() >> such that we can have for a 3x4 matrix, a 12x1 vector or a 2x6 matrix >> or a 4x3 matrix etc... assuming that the coefficients are given by the >> storage order row major or column major. >> >> - sincerely, >> >> Manuel >> >> >> > > >

**References**:**[eigen] refactoring fork: some news***From:*Gael Guennebaud

**Re: [eigen] refactoring fork: some news***From:*Benoit Jacob

**Re: [eigen] refactoring fork: some news***From:*Manuel Yguel

**Re: [eigen] refactoring fork: some news***From:*Thomas Capricelli

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