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Re: To create {{},{},....{}} beyond $MaxRecursionLimit


Hi,

In[1]:=
Table[{},{i,4}]
Out[1]=
{{},{},{},{}}

I don't know what else you may want.

You probably get tons of examples from the group.

Here is another

PadLeft[{},4,"{}"], Although, this one is not equivalent to Table the Head
the elements is String not List.

PadLeft[{},4,List[{}]] All Heads are list. So is PadRight[{},4,List[{}]]

hans





"János" <janos.lobb at yale.edu> wrote in message
news:c238e9$igj$1 at smc.vnet.net...
> Hi,
>
> I am in need of creating a nested list in  the form of {{},{},....{}}
> of arbitrary length where none of the sublists have any element in it.
> I came up with
>
> lst = NestList[List, {},lengthlist - 1]
>
> For[i = 2, i <=
>      lengthlist, i++, flt = Table[{j}, {j, i, lengthlist}]; lst =
> FlattenAt[lst, flt]]
>
> however it complains  when lengthlen is over $MaxRecursionLimit.  I see
> that I can change that Limit to Infinity, but I rather would not go
> that route.  It must be a better way without using NestList.
>
> Any good hint ?
>
> Thanks ahead,
>
> János
> -------------------------------------------------
> clear perl code is better than unclear awk code; but NOTHING comes
> close to unclear perl code
> http://www.faqs.org/faqs/computer-lang/awk/faq/
>


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