Lines Matching full:rows
71 Beyond the functions rows() and cols() that are used to get the number of rows and columns, there are some useful functions that are available to easily get some informations from the matrix.
75 sm1.rows(); // Number of rows
78 sm1.outerSize(); // Number of columns (resp. rows) for a column major (resp. row major )
79 sm1.innerSize(); // Number of rows (resp. columns) for a row major (resp. column major)
169 In many cases, it is necessary to reorder the rows and/or the columns of the sparse matrix for several purposes : fill-in reducing during matrix decomposition, better data locality for sparse matrix-vector products... The class PermutationMatrix is available to this end.
174 sm1.twistedBy(perm) //Apply the permutation on rows and columns
176 sm2 = perm * sm1; // ??? Apply the permutation on rows ???;
180 The following functions are useful to extract a block of rows (resp. columns) from a row-major (resp. column major) sparse matrix. Note that because of the particular storage, it is not ?? efficient ?? to extract a submatrix comprising a certain number of subrows and subcolumns.
184 sm1.middleRows(start, numRows); // For row major matrices, get a range of numRows rows
