adj2sp — converts adjacency form into sparse matrix.
integer vector of length (n+1).
integer vector of length nz containing the row indices for the corresponding elements in anz
column vector of length nz, containing the non-zero elements of A
row vector with 2 entries, mn=size(A)
(optional).
real or complex sparse matrix (nz non-zero entries)
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)
.