sparsearray and its nonempty cells
- To: mathgroup at smc.vnet.net
- Subject: [mg72591] sparsearray and its nonempty cells
- From: Arkadiusz.Majka at gmail.com
- Date: Thu, 11 Jan 2007 03:20:40 -0500 (EST)
Hi,
I bulit the following sparse array
Mysparse=SparseArray[i_ /; 2 â?¤ i â?¤ 11 :> 0.8, 20]
in order to find out all nonempty cells in this array I call (I want to
avoid Normal)
Mysparse/. SparseArray[_, _, _, x_] :> x[[2, 2]]
and I get
{{8}, {11}, {3}, {7}, {2}, {6}, {10}, {9}, {5}, {4}}
This is of course correct, but why it is not sorted????
How can I build Mysparse to get sorted list of nonempty cells?
Arek