nnzero | R Documentation |
Retuen the number of non-zero values of the specified submatrix of a given sparse matrix rapidly
nnzero(m, rows = 1:dim(m)[1], cols = 1:dim(m)[2])
m |
The matrix |
rows |
The integer vector of row index(es) or logical vector indicated the selected rows |
cols |
The integer vector of column index(es) or logical vector indicated the selected cols |
This function implements faster calculation algorithm for the
CsparseMatrix
and RsparseMatrix
class in the package Matrix.
This function will return the number of non-zero values in the specified submatrix.
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