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Gmane
From: petros <pmamales <at> nyc.rr.com>
Subject: compessed_matrix updating issue
Newsgroups: gmane.comp.lib.boost.ublas
Date: Wednesday 29th February 2012 19:26:00 UTC (over 5 years ago)
Hi,
I have a compressed_matrix column oriented matrix. I reead a Harwell Boeing
file, so I can know its sizes and nbrNon0Elements, as well 
the index arrays and the value data.
So I create my matrix, and obtain references to the 3 arrays which I fill
manually (i.e. by reading the file).
Upon inspection of the matrix arrays, I see everything to be OK ( as
expected) but the subscript operator gives 0’s.
Also it appears the the iterators are invalidated – not sure about this
though. 
Apparently there has to be a mechanism to  “lock” things down.
What do I need to do ?
TIA
Petros
 
CD: 4ms