Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2007
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2007

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: 2X2 arrays

  • To: mathgroup at smc.vnet.net
  • Subject: [mg74660] Re: 2X2 arrays
  • From: dh <dh at metrohm.ch>
  • Date: Fri, 30 Mar 2007 02:57:26 -0500 (EST)
  • References: <eufpvj$7ee$1@smc.vnet.net>


Hi,

if I understand you correctly, then the 3 loops are actually an 

additional Outer operation. You could write this as:

MatrixForm[Outer[Outer[Times, #1, #2, #3] & , {a1, a2, a3, a4},

    {a1, a2, a3, a4}, {a1, a2, a3, a4}, 2]]

Daniel



simad at cse.iitkgp.ernet.in wrote:

> Hi,

> 

> I am wondering how to initialize a set of 2X2 arrays in an array.

> for example: 

> a1=1/Sqrt[2]{{1,1},{1,-1}}

> a2=1/Sqrt[2]{{1,0},{0,1}}

> a3=1/Sqrt[2]{{1+I,0},{0,1-I}}

> a4=1/Sqrt[2]{{1,1-I},{1,1+I}}

> 

> to declare in an array so that I can compute the following.

> 

> To use nested For loop to compute the tensor product.

> 

> I want the equivalent of:

> 

>    For[i=1,i<5,i++,

>        For[j=1,j<5,j++,

>            For[k=1,k<5,k++, 

>                            Print[Outer[Times,a[i],a[j],a[k]]]]]]

> 

> Thanks for your sincere help,

> Sima.

> 

> ___________________________________

> IIT Kharagpur, http://www.iitkgp.ac.in

> 

> 

> 

> 

> 

> 




  • Prev by Date: Re: Re: Which Mathematica product
  • Next by Date: Re: Closing All Input Cells at Once
  • Previous by thread: Re: 2X2 arrays
  • Next by thread: Re: 2X2 arrays