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}}