Re: Interrogating lists of unequal lenghths

*To*: mathgroup at smc.vnet.net*Subject*: [mg67394] Re: [mg67367] Interrogating lists of unequal lenghths*From*: gardyloo <gardyloo at mail.wsu.edu>*Date*: Wed, 21 Jun 2006 02:13:23 -0400 (EDT)*References*: <200606200615.CAA15916@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi, Kevin, If your list contains only one "sublevel" of lists (as in your example), try mapping Length over the list. Something like In[1]:= y = {{1, 2}, {3, 4}, {5, 6}} Out[1]= {{1, 2}, {3, 4}, {5, 6}} In[2]:= Length /@ y Out[2]= {2, 2, 2} x = {{1}, {2, 3}, {4, 5, 6, 7}} Length /@ x Out[3]= {{1}, {2, 3}, {4, 5, 6, 7}} Out[4]= {1, 2, 4} Hope that helps! C.O. 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 > > > -- ========================================================== Curtis Osterhoudt gardyloo at mail.remove_this.wsu.and_this.edu PGP Key ID: 0x088E6D7A Please avoid sending me Word or PowerPoint attachments See http://www.gnu.org/philosophy/no-word-attachments.html ========================================================== --------------020009080209040305020807 name="gardyloo.vcf" filename="gardyloo.vcf" begin:vcard fn:Curtis Osterhoudt n:Osterhoudt;Curtis email;internet:gardyloo at mail.remove_this.wsu.and_this.edu tel;work:509.335.4946 x-mozilla-html:FALSE version:2.1 end:vcard --------------020009080209040305020807--

**References**:**Interrogating lists of unequal lenghths***From:*"kevin_jazz" <kevinbowman@mac.com>