[Boost-users] symmetric_matrix operation

Subject: [Boost-users] symmetric_matrix operation
From: Archie14 (admin_at_[hidden])
Date: 2009-05-26 13:50:53

I am very new to the whole Ublas library. I have two symmetric matrices and I 
need to divide each element of the first matrix to the element in the second 
matrix. I am now doing smth like this:

int _matrixsize;
symmetric_matrix<double> mfirst(_matrixsize);
symmetric_matrix<double> msecond(_matrixsize);
symmetric_matrix<double> ratio (_matrixsize);

for (int ifirst = 0; ifirst < _matrixsize; ifirst++)
        for (int isecond = 0; isecond < _matrixsize; isecond++)
                ratio(ifirst, isecond) = mfirst(ifirst, isecond) / msecond
(ifirst, isecond);

My questions are:
1. Can I use iterators (begin1, begin2) and if yes, then how? Examples in the 
doc use above method of iterating through elements, without using iterators.
2. I did not find built-in operators in the symmetric_matrix to do this 
division, but may be I overlooked smth or did not understand the docs?
3. If matrix "msecond" contains zeros - what is the "boost-way" to deal with 
this?