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MathGroup Archive 2004

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Re: Another Combinatorica loading problem

  • To: mathgroup at smc.vnet.net
  • Subject: [mg50105] Re: Another Combinatorica loading problem
  • From: "Steven Shippee" <slshippee at comcast.net>
  • Date: Sun, 15 Aug 2004 03:14:33 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Please replace the one I sent 4 minutes ago with this one:

"Steven Shippee" <slshippee at comcast.net> wrote in message news:...
 Although a novice at Mathematica, I work with computers, and deductively it
 looks like your Combinatorica package does not have to show in your path,
 for example, on my machine with 'default' installations [Version Number:
 5.0.1.0; Platform: Windows], we find:

 Default Packages:

 In[1]:=$Packages
 Out[1]={"Graphics`Arrow`",   "Utilities`FilterOptions`",
 "Graphics`Common`GraphicsCommon`", "Graphics`Legend`",  "Graphics`Colors`",
 "ATM`",
   "Global`", "System`"}

 Load Combinatorica    << DiscreteMath`Combinatorica`

 Resulting in: In[3]:=$Packages
 Out[3]={"Statistics`Common`DistributionsCommon`",  "DiscreteMath`Tree`",
 "Statistics`DataManipulation`", "Statistics`DescriptiveStatistics`",
 "Statistics`DiscreteDistributions`",
"DiscreteMath`CombinatorialFunctions`",
 "DiscreteMath`Combinatorica`", "Graphics`Arrow`",
   "Utilities`FilterOptions`",   "Graphics`Common`GraphicsCommon`",
 "Graphics`Legend`",   "Graphics`Colors`", "ATM`",  "Global`", "System`"}

 Showing the package loaded OK, and path shows it [Combinatoria] is not
 required to show in the path, I assume?

 In[4]:=$Path
 Out[4]={"C:\\Program Files\\Wolfram
 Research\\Mathematica\\5.0\\AddOns\\JLink",
 "C:\\Program Files\\Wolfram Research\\Mathematica\\5.0\\AddOns\\NETLink",
 "C:\\Documents and Settings\\shis235\\Application
 Data\\Mathematica\\Kernel",
  "C:\\Documents and Settings\\shis235\\Application
 Data\\Mathematica\\Autoload",
  "C:\\Documents and Settings\\shis235\\Application
 Data\\Mathematica\\Applications",
 "C:\\Documents and Settings\\All Users\\Application
 Data\\Mathematica\\Kernel",
 "C:\\Documents and Settings\\All Users\\Application
 Data\\Mathematica\\Autoload",
  "C:\\Documents and Settings\\All Users\\Application
 Data\\Mathematica\\Applications", ".",
 "C:\\Documents and Settings\\shis235",
 "C:\\Program Files\\Wolfram
 Research\\Mathematica\\5.0\\AddOns\\StandardPackages",
 "C:\\Program Filles\\Wolfram
 Research\\Mathematica\\5.0\\AddOns\\StandardPackages\\StartUp",
 "C:\\Program Files\\Wolfram Research\\Mathematica\\5.0\\AddOns\\Autoload",
 "C:\\Program Files\\Wolfram
 Research\\Mathematica\\5.0\\AddOns\\Applications",
 "C:\\Program Files\\Wolfram
 Research\\Mathematica\\5.0\\AddOns\\ExtraPackages",
 "C:\\Program Files\\Wolfram
 Research\\Mathematica\\5.0\\SystemFiles\\Graphics\\Packages",
 "C:\\Program Files\\Wolfram
 Research\\Mathematica\\5.0\\Configuration\\Kernel"}

 In[19]:=And permutations works just fine?
 Permutations[{a,b,c,d}]
 Out[19]=

{{a,b,c,d},{a,b,d,c},{a,c,b,d},{a,c,d,b},{a,d,b,c},{a,d,c,b},{b,a,c,d},{b,a,
 d,
     c},{b,c,a,d},{b,c,d,a},{b,d,a,c},{b,d,c,a},{c,a,b,d},{c,a,d,b},{c,b,a,
     d},{c,b,d,a},{c,d,a,b},{c,d,b,a},{d,a,b,c},{d,a,c,b},{d,b,a,c},{d,b,c,
     a},{d,c,a,b},{d,c,b,a}}

  > << DiscreteMath`Combinatorica`
 > nor
 > Needs["DiscreteMath`Combinatorica`"];
 >
 > apparently loads it because NthPermutation[100,{a,b,c,d,e,f,g}] just
 echoes NthPermutation.

 I think if you do a
 ?Permutation

 you will not find an "NthPermutation" is obsolete, and perhaps you need to
revisit your
 intial input/directions to mathematica as in trying
UnrankPermutation

instead.  Being a novice I find that if mathematica spits back what I asked
it to do
 verbatim, I have usually screwed up in my input, which then causes me to go
 bug David Park and have him gently show me it is my input, not the
 computer's lack of processing ability!!


 Steven Shippee
 slshippee at comcast.net




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