[ublas] Accessing the indices of non-zero elements in a UBLAS sparse vector

Subject: [ublas] Accessing the indices of non-zero elements in a UBLAS sparse vector
From: Tarek Elsayed (t.elsayed_at_[hidden])
Date: 2011-09-21 12:30:14

Hello,
How can I know the index of the first non-zero element in a
sparse_vector in ublas and each subsequent nonzero element as well?
The function begin() gives me an iterator that can be used to know the
first non-zero value stored, not its index in the vector.
Tarek