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MathGroup Archive 2005

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Re: Inconsistent evaluation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg61925] Re: Inconsistent evaluation
  • From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
  • Date: Sat, 5 Nov 2005 01:52:08 -0500 (EST)
  • Organization: Uni Leipzig
  • References: <dkfcjb$eo5$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

how can we "reproduce" the problem on our own 
machines ?
how can we see what your initial cell does ?

In general you should set up a different cell for
Get[] and Needs[] to be sure, that the variables
in the packages are parsed and added to the symbol
table first. And than make a second cell with you
own definitions. This was a problem with an older
Mathematica version, that the parser scan the cell
before the kernel evaluate it and so the parser
create the symbols before it got the definition
for it from the evaluation of Get[]/Needs[]

Regards
  Jens

"leigh pascoe" <leigh at cephb.fr> schrieb im 
Newsbeitrag news:dkfcjb$eo5$1 at smc.vnet.net...
| Dear Mathgroup,
|
| I tried to post this question a few days ago, 
but it didn't appear. I
| assume this was because I pasted in error 
messages from Mathematica in
| non text form, so I'll try again.
|
| I have a notebook with an initial cell that 
calls Combinatorica and
| contains a number of function definitions of the 
set delayed type. Each
| time I open the notebook I seem to get a 
different behaviour when I
| evaluate the first cell. Two different sets of 
messages resulting from
| an evaluation of the first cell are pasted in 
below this message.
|
|
| Most recently I did the following:
|
| 1. Start Ma and open the file. Evaluate the 
first cell. This gives me
| the long list of error messages pasted in below.
| 2. Then close Ma without saving anything. 
Restart Ma and reopen the
| notebook, without evaluating the first cell. I 
then opened a new
| notebook and pasted the definitions from the 
original notebook and
| evaluated them one at a time. No error messages.
|
| Other times I get a single warning about using 
the variable "list"
| (defined inside a module) that is similar to 
"List". Does Ma remember
| data from previous sessions even though I have 
closed the program? What
| am I not understanding here??
|
| Ma 5.0 Windows XP Pro
|
| Thanks
|
| LP
|
| Error messages:
|
| RowBox[{\(VertexNumber::"shdw"\), \(\(:\)\(\ 
\)\), "\<\"Symbol \
| \\!\\(\\\"VertexNumber\\\"\\) appears in 
multiple contexts \
| \\!\\({\\\"DiscreteMath`Combinatorica`\\\", 
\\\"Global`\\\"}\\);
| definitions \
| in context 
\\!\\(\\\"DiscreteMath`Combinatorica`\\\"\\) may 
shadow or be \
| shadowed by other definitions.
| \\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(VertexStyle::"shdw"\), \(\(:\)\(\ 
\)\), "\<\"Symbol \
| \\!\\(\\\"VertexStyle\\\"\\) appears in multiple 
contexts \
| \\!\\({\\\"DiscreteMath`Combinatorica`\\\", 
\\\"Global`\\\"}\\);
| definitions \
| in context 
\\!\\(\\\"DiscreteMath`Combinatorica`\\\"\\) may 
shadow or be \
| shadowed by other definitions.
| \\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(SetDelayed::"write"\), \(\(:\)\(\ 
\)\), "\<\"Tag
| \\!\\(Times\\) \
| in \\!\\(Null\\\\ Null\\\\ Null\\\\ Null\\\\ 
Null\\\\ Null\\\\ Null\\\\ \
| Null\\\\ Null\\\\ Null\\\\ Null\\\\ 
\\(\\(\[LeftSkeleton] 11
| \[RightSkeleton]\
| \\)\\)\\\\ Null\\\\ Null\\\\ Null\\\\ Null\\\\ 
Null\\\\ Null\\\\ Null\\\\ \
| Null\\\\ Null\\\\ Null\\\\ 
\\(\\(blchains[n_]\\)\\)\\) is Protected. \
| \\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\",
| ButtonStyle->\\\"RefGuideLinkText\
| \\\", ButtonFrame->None, 
ButtonData:>\\\"General::write\\\"]\\)\"\>"}]\)
| Out[1]=
| $Failed
|
|
| Here are messages from another fresh valuation 
of the first cell (they
| are not the same as those above!?)
|
| >From In[1]:=
| \!\(\*
| RowBox[{\(General::"spell1"\), \(\(:\)\(\ \)\), 
"\<\"Possible spelling \
| error: new symbol name \\\"\\!\\(Large\\)\\\" is 
similar to existing
| symbol \
| \\\"\\!\\(Larger\\)\\\". 
\\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::spell1\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(Blue::"shdw"\), \(\(:\)\(\ \)\), 
"\<\"Symbol \
| \\!\\(\\\"Blue\\\"\\) appears in multiple 
contexts \
| \\!\\({\\\"Graphics`Colors`\\\", 
\\\"Global`\\\"}\\); definitions in
| context \
| \\!\\(\\\"Graphics`Colors`\\\"\\) may shadow or 
be shadowed by other \
| definitions. 
\\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(Green::"shdw"\), \(\(:\)\(\ \)\), 
"\<\"Symbol
| \\!\\(\\\"Green\\\"\
| \\) appears in multiple contexts 
\\!\\({\\\"Graphics`Colors`\\\",
| \\\"Global`\
| \\\"}\\); definitions in context 
\\!\\(\\\"Graphics`Colors`\\\"\\) may
| shadow \
| or be shadowed by other definitions.
| \\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\
| \", ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(Red::"shdw"\), \(\(:\)\(\ \)\), 
"\<\"Symbol
| \\!\\(\\\"Red\\\"\\) \
| appears in multiple contexts 
\\!\\({\\\"Graphics`Colors`\\\", \
| \\\"Global`\\\"}\\); definitions in context
| \\!\\(\\\"Graphics`Colors`\\\"\\) \
| may shadow or be shadowed by other definitions.
| \\!\\(\\*ButtonBox[\\\"More\
| \[Ellipsis]\\\", 
ButtonStyle->\\\"RefGuideLinkText\\\",
| ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(AddEdges::"shdw"\), \(\(:\)\(\ \)\), 
"\<\"Symbol \
| \\!\\(\\\"AddEdges\\\"\\) appears in multiple 
contexts \
| \\!\\({\\\"DiscreteMath`Combinatorica`\\\", 
\\\"Global`\\\"}\\);
| definitions \
| in context 
\\!\\(\\\"DiscreteMath`Combinatorica`\\\"\\) may 
shadow or be \
| shadowed by other definitions.
| \\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(AddVertices::"shdw"\), \(\(:\)\(\ 
\)\), "\<\"Symbol \
| \\!\\(\\\"AddVertices\\\"\\) appears in multiple 
contexts \
| \\!\\({\\\"DiscreteMath`Combinatorica`\\\", 
\\\"Global`\\\"}\\);
| definitions \
| in context 
\\!\\(\\\"DiscreteMath`Combinatorica`\\\"\\) may 
shadow or be \
| shadowed by other definitions.
| \\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(DeleteEdges::"shdw"\), \(\(:\)\(\ 
\)\), "\<\"Symbol \
| \\!\\(\\\"DeleteEdges\\\"\\) appears in multiple 
contexts \
| \\!\\({\\\"DiscreteMath`Combinatorica`\\\", 
\\\"Global`\\\"}\\);
| definitions \
| in context 
\\!\\(\\\"DiscreteMath`Combinatorica`\\\"\\) may 
shadow or be \
| shadowed by other definitions.
| \\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(EdgeColor::"shdw"\), \(\(:\)\(\ \)\), 
"\<\"Symbol \
| \\!\\(\\\"EdgeColor\\\"\\) appears in multiple 
contexts \
| \\!\\({\\\"DiscreteMath`Combinatorica`\\\", 
\\\"Global`\\\"}\\);
| definitions \
| in context 
\\!\\(\\\"DiscreteMath`Combinatorica`\\\"\\) may 
shadow or be \
| shadowed by other definitions.
| \\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(Edges::"shdw"\), \(\(:\)\(\ \)\), 
"\<\"Symbol
| \\!\\(\\\"Edges\\\"\
| \\) appears in multiple contexts
| \\!\\({\\\"DiscreteMath`Combinatorica`\\\", \
| \\\"Global`\\\"}\\); definitions in context \
| \\!\\(\\\"DiscreteMath`Combinatorica`\\\"\\) may 
shadow or be shadowed by \
| other definitions. 
\\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(EdgeStyle::"shdw"\), \(\(:\)\(\ \)\), 
"\<\"Symbol \
| \\!\\(\\\"EdgeStyle\\\"\\) appears in multiple 
contexts \
| \\!\\({\\\"DiscreteMath`Combinatorica`\\\", 
\\\"Global`\\\"}\\);
| definitions \
| in context 
\\!\\(\\\"DiscreteMath`Combinatorica`\\\"\\) may 
shadow or be \
| shadowed by other definitions.
| \\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(GridGraph::"shdw"\), \(\(:\)\(\ \)\), 
"\<\"Symbol \
| \\!\\(\\\"GridGraph\\\"\\) appears in multiple 
contexts \
| \\!\\({\\\"DiscreteMath`Combinatorica`\\\", 
\\\"Global`\\\"}\\);
| definitions \
| in context 
\\!\\(\\\"DiscreteMath`Combinatorica`\\\"\\) may 
shadow or be \
| shadowed by other definitions.
| \\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(KSubsets::"shdw"\), \(\(:\)\(\ \)\), 
"\<\"Symbol \
| \\!\\(\\\"KSubsets\\\"\\) appears in multiple 
contexts \
| \\!\\({\\\"DiscreteMath`Combinatorica`\\\", 
\\\"Global`\\\"}\\);
| definitions \
| in context 
\\!\\(\\\"DiscreteMath`Combinatorica`\\\"\\) may 
shadow or be \
| shadowed by other definitions.
| \\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(Large::"shdw"\), \(\(:\)\(\ \)\), 
"\<\"Symbol
| \\!\\(\\\"Large\\\"\
| \\) appears in multiple contexts
| \\!\\({\\\"DiscreteMath`Combinatorica`\\\", \
| \\\"Global`\\\"}\\); definitions in context \
| \\!\\(\\\"DiscreteMath`Combinatorica`\\\"\\) may 
shadow or be shadowed by \
| other definitions. 
\\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(SetGraphOptions::"shdw"\), \(\(:\)\(\ 
\)\), "\<\"Symbol \
| \\!\\(\\\"SetGraphOptions\\\"\\) appears in 
multiple contexts \
| \\!\\({\\\"DiscreteMath`Combinatorica`\\\", 
\\\"Global`\\\"}\\);
| definitions \
| in context 
\\!\\(\\\"DiscreteMath`Combinatorica`\\\"\\) may 
shadow or be \
| shadowed by other definitions.
| \\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(Thick::"shdw"\), \(\(:\)\(\ \)\), 
"\<\"Symbol
| \\!\\(\\\"Thick\\\"\
| \\) appears in multiple contexts
| \\!\\({\\\"DiscreteMath`Combinatorica`\\\", \
| \\\"Global`\\\"}\\); definitions in context \
| \\!\\(\\\"DiscreteMath`Combinatorica`\\\"\\) may 
shadow or be shadowed by \
| other definitions. 
\\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| RowBox[{\(VertexColor::"shdw"\), \(\(:\)\(\ 
\)\), "\<\"Symbol \
| \\!\\(\\\"VertexColor\\\"\\) appears in multiple 
contexts \
| \\!\\({\\\"DiscreteMath`Combinatorica`\\\", 
\\\"Global`\\\"}\\);
| definitions \
| in context 
\\!\\(\\\"DiscreteMath`Combinatorica`\\\"\\) may 
shadow or be \
| shadowed by other definitions.
| \\!\\(\\*ButtonBox[\\\"More\[Ellipsis]\\\", \
| ButtonStyle->\\\"RefGuideLinkText\\\", 
ButtonFrame->None, \
| ButtonData:>\\\"General::shdw\\\"]\\)\"\>"}]\)
| >From In[1]:=
| \!\(\*
| 



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