Re: Matrixes with complex numbers

From: Edmond Offermann <edmondoffermann_at_yahoo.com>
Date: Tue, 27 Feb 2007 08:57:38 -0800 (PST)

Hi,

I had some emails to Mario only (unfortunately) . Here are the responses:

Eddy->Mario:

---

  Have a look at matrix/inc/TMatrixDfwd.h and you will see that TMatrixD
  is just a typedef of the templated clas TMatrixT:

  template<class Element> class TMatrixT;   typedef TMatrixT<Double_t> TMatrixD;

  So for complex matrices one could try

  typedef TMatrixT<TComplex> TMatrixC

Mario->Eddy:

---

  root [0] typedef TMatrixT<TComplex> TMatrixC   Limitation: Can't instantiate precompiled template TMatrixT<TComplex>   

  (tmpfile):1:

• Interpreter error recovered ***

  any more ideas?

Eddy->Mario:

---

  You have an issue here with CINT .
  Have a look at matrix/inc/LinkDef.h and see what has to be done to   have CINT understand this new type . For instance for TMatrixD you   will find lines like :

  #pragma link C++ class TMatrixT                <Double_t>-;

  #pragma link C++ typedef TMatrixD;

• Rene Brun <Rene.Brun_at_cern.ch> wrote:

> Hi Mario,
>
> None of the matrix classes in ROOT can be used with complex numbers.
> This could, in theory, be implemented withing TMatrix (already
> templated).
> However, the support for operations (of course what you want) would
> require a bit more work.
> May be, Eddy wants to add something to my mail ?
>
> Rene Brun
>
>
> Mario Kadastik wrote:
> > Hello,
> >
> > I have tried searching for a way to have matrices with complex
> numbers
> > in them and still have the functionality of matrices and have
> turned
> > up with a number of questions on the web however basically no
> answers.
> > Is there a way to use complex numbers in ROOT in matrices (there's
> the
> > complex class which enables one to have complex numbers and do
> > operations on them, but there seems not to be a way to have a
> matrix
> > with complex numbers in it). I have used until now TMatrixD for
> > matrices with doubles in them, but how do I extend that to include
> > complex numbers?
> >
> > Mario
>
>
Received on Tue Feb 27 2007 - 17:57:47 CET