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MathGroup Archive 2003

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Problems understanding code

  • To: mathgroup at smc.vnet.net
  • Subject: [mg44216] Problems understanding code
  • From: emmanuelle.dottax at free.fr (Emmanuelle Dottax)
  • Date: Tue, 28 Oct 2003 05:53:26 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

Hello,

I have some Mathematica 3.0 code that I'm trying to understand. There
is one line I quite don't understand, and I was unable to find an
explanation on the web. Maybe someone here could help me.

Here is the code:

--------------
id=IdentityMatrix[n(n+1)(n+2)/6];
Do[M[i]=id[[Flatten[Table[mu[i,j,k] ,{j, 0, n-1},{k, j, n-1}]]]], {i,
0, n-1}];
--------------

where the mu[i,j,k] are values defined earlier. What I do not
understand is the "id[[". What does it mean ?

Many thanks in advance.

-- Emmanuelle


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