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MathGroup Archive 2006

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how to sort integers and sparsearrays ?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg71954] how to sort integers and sparsearrays ?
  • From: Arkadiusz.Majka at gmail.com
  • Date: Wed, 6 Dec 2006 06:03:32 -0500 (EST)

Hi,

I have a list of a form

list = {k, {SparseArray[],SparseArray[], {A,SparseArray[]}}}

A is integer, k is list

What to do to convert it to

{{k,A},{SparseArray[],SparseArray[],SparseArray[]}}

The length of list is unknown. We don't know where A appears. We only
know that it is integer and forms a list {A, SparseArray[]}.

I can't just use

list/.{a___,{b_,c_,{d_,e_}}}

because this pattern will not suit nither to e.g

list2=  {{0,3}},
{{A,SparseArray[]},SparseArray[],SparseArray[],SparseArray[],SparseArray[]}


nor

list3=  {{0,3}},
{SparseArray[],SparseArray[],SparseArray[],SparseArray[],SparseArray[]}


where there is no A at all.

Help,

Arek


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