Man Scilab

adj2sp
Scilab Function

adj2sp - converts adjacency form into sparse matrix.

Parameters

Description


sp2adj converts an adjacency form representation of a matrix
into its standard Scilab representation (utility fonction).
xadj, adjncy, anz = adjacency representation of A i.e:
   
    

xadj(j+1)-xadj(j) = number of non zero entries in row j. adjncy = column index of the non zeros entries in row 1, row 2,..., row n. anz = values of non zero entries in row 1, row 2,..., row n. xadj is a (column) vector of size n+1 and adjncy is an integer (column) vector of size nz=nnz(A) . anz is a real vector of size nz=nnz(A) .

Examples


A = sprand(100,50,.05);
[xadj,adjncy,anz]= sp2adj(A);
[n,m]=size(A);
p = adj2sp(xadj,adjncy,anz,[n,m]);
A-p,
 
  

See Also

sp2adj ,   spcompack ,  

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