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Re: Command similar to flatten??

  • To: mathgroup at smc.vnet.net
  • Subject: [mg89292] Re: Command similar to flatten??
  • From: Bill Rowe <readnews at sbcglobal.net>
  • Date: Wed, 4 Jun 2008 05:36:31 -0400 (EDT)

On 6/3/08 at 3:59 AM, enoel2 at gmail.com (Erin Noel) wrote:

>I am pretty new to Mathematica coding so bear with me...

>I have a list of lists named "A" whose dimensions are {4,10,1100,5}
>and I want to basically "combine" those first two levels so that the
>dimensions become {40,1100,5} but I have no idea how to do
>that...Any suggestions?

You can apply Join to A, for example

In[19]:= data = RandomInteger[1, {4, 10, 1100, 5}];
Dimensions@data

Out[20]= {4,10,1100,5}

In[21]:= Dimensions[Join @@ data]

Out[21]= {40,1100,5}

Another alternative would be to use Flatten with its second
optional argument


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