SparseArray[]: no warning for repeated indices
- To: mathgroup at smc.vnet.net
- Subject: [mg97702] SparseArray[]: no warning for repeated indices
- From: Szabolcs Horvát <szhorvat at gmail.com>
- Date: Thu, 19 Mar 2009 02:10:41 -0500 (EST)
By default, SparseArray[] gives no warning when an index is specified
twice. Example:
SparseArray[{1->a, 2->b, 1->c}]
This is incorrect because both a and c are associated with index 1, but
SparseArray gives no warning.
Is there a message that can be turned on to get SparseArray to warn
about such situations?