[Seqan-dev] Sparse property map

[John Reid <j.reid@mail.cryst.bbk.ac.uk>]

Hi,

If I want to store a property for every vertex in a suffix array I can 
do something like this:

    String< double > property;
    const double v = 1.3;
    resizeVertexMap( index, property );
    assignProperty( property, value( top_down_it( index ) ), v );
    const double prop_value = getProperty( property, value( 
top_down_it( index ) ) );

Here the properties are stored in a seqan::String. What if I only want 
to store properties for a very few of the vertices in a very large 
index? Is there some sparse storage I can use instead of String?

Thanks,
John.