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RE: Illumination or obfuscation?

  • To: mathgroup at
  • Subject: [mg43971] RE: [mg43943] Illumination or obfuscation?
  • From: "John C. Erb, Ph.D." <John_C_Erb at>
  • Date: Thu, 16 Oct 2003 04:16:03 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

I certainly would not call myself a Mathematica expert,
though I have been "playing" with Mathematica for 10 years.
For me, it is not clear and easy to understand.

My 2 cents
John C. Erb
Email: John_C_Erb at

-----Original Message-----
From: Steven T. Hatton [mailto:hattons at] 
To: mathgroup at
Subject: [mg43971] [mg43943] Illumination or obfuscation?

To an experienced Mathematica user, is the following snippet clear, and
to understand, or simply an exercise in obfuscation? Assume I already
px,py and m[] lying around.

px = {1, 0}; 
py = {0, 1};

m[th_] := {{Cos[th], Sin[th]}, {-Sin[th], Cos[th]}}

crossPoint[p_, th_:0, L_:0.5] := 
  Arrow[##,HeadLength -> 0.015]&@@#&/@(p+#.m[th]&/@{-#, #}&/@(L{px,

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