zla_lin_berr3lapack
Zla_lin_berr compute componentwise relative backward error from the formula max(i) ( abs(r(i)) / ( abs(op(a_s))*abs(y) + abs(b_s) )(i) ) where abs(z) is the componentwise absolute value of the matrix or vector z
Usage
- SUBROUTINE ZLA_LIN_BERR
-
( N, NZ, NRHS, RES, AYB, BERR )
- IMPLICIT
-
NONE
- INTEGER
-
N, NZ, NRHS
- DOUBLE
-
PRECISION AYB( N, NRHS ), BERR( NRHS )
- COMPLEX*16
-
RES( N, NRHS )
Purpose
ZLA_LIN_BERR computes componentwise relative backward error from
the formula
max(i) ( abs(R(i)) / ( abs(op(A_s))*abs(Y) + abs(B_s) )(i) )
where abs(Z) is the componentwise absolute value of the matrix
or vector Z.