Le 27/09/2015 12:53, David Chèze a écrit :
.../... For large matrix in data
manipulation (typ. 100000 rows), it's necessary to use sparse to allocate
better the diag matrix otherwise it's out of memory for usual machine.
So i'm using --> diag(sparse(v)) * A
.
The sparse encoding may become bulkier than the dense one if the actual
density of contents is not low.
Now, are A or/and v actually sparse (i mean with a low density)? You did
not give infos about that.
Samuel
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