| FreeMat
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Section: Sparse Matrix Support
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)