Span Set nasty bug
- To: mathgroup at smc.vnet.net
- Subject: [mg123728] Span Set nasty bug
- From: roby <roby.nowak at gmail.com>
- Date: Fri, 16 Dec 2011 05:54:36 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
Dear group & Mathematica team I am trying to assign a non existing element member of a 2D List. Due to the coosen Span the element should not exist respectivly not be assigned. when the non existing element is queried e.g. {} should be returned please take a look on the following assignment: In[43]:= t = Table[0, {15}, {15}]; t[[1 ;; 0, 1 ;; 1]] = 1; t[[1 ;; 0, 1 ;; 1]] t[[1, 1]] Out[45]= {} Out[46]= 0 so far so good no element gets assigned and the query works, after changing 15 to 16 or greater the query still works but the following happens element [[1,1]] gets a value assigned: In[47]:= t = Table[0, {16}, {16}]; t[[1 ;; 0, 1 ;; 1]] = 1; t[[1 ;; 0, 1 ;; 1]] t[[1, 1]] Out[49]= {} Out[50]= 1 Is this a bug or is it a feature ?
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- Re: Span Set nasty bug