Fast multiply, nonzero structure
... Similarly, an upper triangular matrix U satisfies uij = 0 for j < i. A banded matrix has zeros outside some distance of the diagonal; that is, B is banded with lower bandwidth p and upper bandwidth q if bij = 0 for j < i − p and j > i + q. For example, a matrix with lower bandwidth 1 and upper bandw ...
... Similarly, an upper triangular matrix U satisfies uij = 0 for j < i. A banded matrix has zeros outside some distance of the diagonal; that is, B is banded with lower bandwidth p and upper bandwidth q if bij = 0 for j < i − p and j > i + q. For example, a matrix with lower bandwidth 1 and upper bandw ...
Using PROC IML to solve a set of simultaneous equations.
... Note from the definition of the M inverse: Adjoint(M) --------------Determinant(M) that this will be valid only if the determinant of M is not zero, i.e., when the matrix , M, is said to be ‘non singular’. Now it is time to move to a SAS script and use PROC IML (interactive matrix language) to expr ...
... Note from the definition of the M inverse: Adjoint(M) --------------Determinant(M) that this will be valid only if the determinant of M is not zero, i.e., when the matrix , M, is said to be ‘non singular’. Now it is time to move to a SAS script and use PROC IML (interactive matrix language) to expr ...
