[ublas] Assignement of a matrix with a pointer to the matrix data !?

From: rustinc (cedric.rustin_at_[hidden])
Date: 2008-02-04 11:27:59

Hi, I'm a new Ublas user.
I wish to do the following thing: I want to create a new matrix specifying its 
size (m rows, n columns) and a pointer to the data contained in the matrix.  
These data naturally fit the UBLAS storage. It is maybe a little bit strange 
but I necessary need this functionality. 
I explain why...
In fact I implement a program in which two processes run in parallel (thanks 
to pthreads,shared memory or MPI). It exists some common interface between 
the two processes. In the first process a UBLAS matrix is created and 
assigned, the interface is created and it contains the matrix data. The other 
process knows the size of the matrix but I really don't wish to copy the data 
of the interface in a new matrix. The size of the interface is really big and 
the update of the quantities at the interface occurs very often. 
I assume it exists in the vector/matrix class a pointer to the data. If yes 
what? May I to assigned it? Or is it protected???
How have I to do?

-- 
Rustin Cédric
Aspirant F.N.R.S.
065/37.42.17.
0479/42.60.82.
Faculté Polytechnique de Mons (FPMs)
Service de Mécanique rationnelle, Dynamique et Vibrations
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7000 Mons (Belgique)