Determine connected compoments of a graph stored as a compressed sparse row or column matrix. For speed reasons, the symmetry of the matrix x is not checked. A nonzero at index (i, j) means that node i is connected to node j by an edge. The number of rows/columns of the matrix thus corresponds to the number of nodes in the graph.
x: ndarray-like, 2 dimensions, or sparse matrix :
n_comp: int :
label: ndarray (ints, 1 dimension): :
The matrix is assumed to be symmetric and the upper triangular part of the matrix is used. The matrix is converted to a CSR matrix unless it is already a CSR.