SPARSE  SPARSE Construct a Sparse Matrix


Usage
 
 Creates a sparse matrix using one of several formats.  The 
 first creates a sparse matrix from a full matrix
 
    y = sparse(x).
 
 The second form creates a sparse matrix containing all zeros
 that is of the specified size (the sparse equivalent of
 zeros).
 
    y = sparse(m,n)
 
 where m and n are integers.  Just like the zeros function,
 the sparse matrix returned is of type float.  The third form 
 constructs a sparse matrix from the IJV syntax.  It has two forms.  The
 first version autosizes the sparse matrix 
 
    y = sparse(i,j,v)
 
 while the second version uses an explicit size specification
 
    y = sparse(i,j,v,m,n)
 
 