Dear all,

I am trying to update a legacy application with hand-rolled matrix routines. I have noted there is a way I can interface the raw data pointers to Eigen via the map interface:
http://eigen.tuxfamily.org/dox-devel/gr ... Class.html

Unfortunately, one of the matrices I am most interested in is an upper triangular matrix in row-major format, i.e.

Code: Select all

1 2 3 4
0 5 6 7
0 0 8 9
0 0 0 10

stored as:
1 2 3 4 5 6 7 8 9 10


Is there a way for this to be easily mapped, or will I have to copy the data across?

-- Damien

I am afraid this is not currently supported. We did briefly discuss this (and similar) packed storage schemes for triangular matrices, and it would be nice to have, but nobody has implemented it yet.

jitseniesen wrote:I am afraid this is not currently supported. We did briefly discuss this (and similar) packed storage schemes for triangular matrices, and it would be nice to have, but nobody has implemented it yet.

Oh no! That's a little unfortunate.

Thanks anyway!

-- Damien