Re: Interrogating lists of unequal lenghths
- To: mathgroup at smc.vnet.net
- Subject: [mg67385] Re: Interrogating lists of unequal lenghths
- From: Roger Bagula <rlbagula at sbcglobal.net>
- Date: Wed, 21 Jun 2006 02:13:01 -0400 (EDT)
- References: <e784k6$fq5$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
kevin_jazz wrote:
>I'm trying to understand how to assess the dimensions of a list
>containing elements of unequal length.
>Let's say I have the list with elements of equal sizes
>
>In[12]:=
>y={{1,2},{3,4},{5,6}}
>
>Out[12]=
>{{1,2},{3,4},{5,6}}
>
>In[13]:=
>Dimensions[y]
>
>Out[13]=
>{3,2}
>
>Using the Dimensions function I can determine the size of the resulting
>array. If, on the other hand, I set up the following list
>
>In[5]:=
>x={{1},{2,3},{4,5,6,7}}
>
>In[6]:=
>Dimensions[x]
>
>Out[6]=
>{3}
>
>The Dimensions command tells me I have only 3 elements. But, I need
>some way to figure out that the first sublist has length 1, second has
>length 2, and the third has length 4 in some automated fashion. I've
>looked through the other commands like Depth and Length but I don't see
>anything that does this.
>
>What's the right to do it?
>
>Thanks,
>
>Kevin
>
>
>
x={{1},{2,3},{4,5,6,7}}
Table[Length[x[[n]]], {n, 1, Length[x]}]