Re: Using implicit information about row indices
- To: mathgroup at smc.vnet.net
- Subject: [mg68323] Re: Using implicit information about row indices
- From: "Ray Koopman" <koopman at sfu.ca>
- Date: Tue, 1 Aug 2006 06:59:52 -0400 (EDT)
- References: <eakcj6$qce$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
In[1]:= L = {{{1, a}, {2, b}},
{{1, c}, {2, d}, {3, e}, {4, f}},
{{2, g}, {3, h}, {4, i}},
{{3, k}, {4, l}, {5,m}},
{{4, n}, {5, p}}};
In[2]:= Normal[SparseArray[ Rule @@@ #, {Length@L}]& /@ L]
Out[2]= {{a,b,0,0,0},
{c,d,e,f,0},
{0,g,h,i,0},
{0,0,k,l,m},
{0,0,0,n,p}}