Re: buggy part allocation ?
- To: mathgroup at smc.vnet.net
- Subject: [mg23463] Re: buggy part allocation ?
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Thu, 11 May 2000 00:54:13 -0400 (EDT)
- Organization: Universitaet Leipzig
- References: <8fb1p5$hqm@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi Chris,
I can't explain and I can't reproduce it
with Mathematica 4.0.2 and IRIX and Matheamtica 4.0.2 and NT (SP4)
Regards
Jens
Chris Slinger wrote:
>
> I'm having problems with silly results. The cause seems to be faulty
> parts allocation. This is illustrated below. I've mailed wolfram
> support but have yet to receive a reply. I'm running v4.0.1 for X on
> Sun Solaris. I know that there has been trouble with Range[] in the
> past, but thought that this had been fixed.
>
> Can anyone explain the following behaviour ?
>
> In[1]:=$Version
> Out[1]="4.0 for Solaris (July 21, 1999)"
>
> In[2]:=$CreationDate
> Out[2]={1999, 7, 21, 1, 43, 0}
>
> In[3]:= m = 256; list = Table[0, {m}, {m}];
> insert = Table[Random[Complex, {-1 - I, +1 + I}], {10}, {250}];
>
> In[4]:= list[[Range[10], Range[250]]] = 1*insert; MatrixQ[list]
> Out[4]=True
>
> In[5]:=list[[Range[10], Range[250]]] = 2*insert; MatrixQ[list]
> Out[5]=False
>
> In[6]:= thing = 2*insert; list[[Range[10], Range[250]]] = thing; MatrixQ[list]
> Out[6]=False
>
> __________________________
>
> Out[5] and Out[6] should, I imagine, be "True" - simply changing from
> 1*insert to 2*insert breaks the parts allocation.
>
> The above behaviour is also exhibited on NT systems. What is happening
> here ? Am I doing something daft ?!
>
> Please copy any correspondence on this to my e-mail, as I often
> miss the newsgroup postings....
>
> Thanks,
> -chris
> slinger at signal.dera.gov.uk
>
> PS - this has echoes of the complex packed array bug (now supposed to
> be fixed). If "insert" is Real, there are no problems in the above...