|
version 1.10, 2012/08/22 09:48:18
|
version 1.11, 2012/12/14 12:30:23
|
|
Line 1
|
Line 1
|
| *> \brief \b DLANSY |
*> \brief \b DLANSY returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a real symmetric matrix. |
| * |
* |
| * =========== DOCUMENTATION =========== |
* =========== DOCUMENTATION =========== |
| * |
* |
|
Line 115
|
Line 115
|
| *> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
| *> \author NAG Ltd. |
*> \author NAG Ltd. |
| * |
* |
| *> \date November 2011 |
*> \date September 2012 |
| * |
* |
| *> \ingroup doubleSYauxiliary |
*> \ingroup doubleSYauxiliary |
| * |
* |
| * ===================================================================== |
* ===================================================================== |
| DOUBLE PRECISION FUNCTION DLANSY( NORM, UPLO, N, A, LDA, WORK ) |
DOUBLE PRECISION FUNCTION DLANSY( NORM, UPLO, N, A, LDA, WORK ) |
| * |
* |
| * -- LAPACK auxiliary routine (version 3.4.0) -- |
* -- LAPACK auxiliary routine (version 3.4.2) -- |
| * -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
| * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
| * November 2011 |
* September 2012 |
| * |
* |
| * .. Scalar Arguments .. |
* .. Scalar Arguments .. |
| CHARACTER NORM, UPLO |
CHARACTER NORM, UPLO |
|
Line 149
|
Line 149
|
| EXTERNAL DLASSQ |
EXTERNAL DLASSQ |
| * .. |
* .. |
| * .. External Functions .. |
* .. External Functions .. |
| LOGICAL LSAME |
LOGICAL LSAME, DISNAN |
| EXTERNAL LSAME |
EXTERNAL LSAME, DISNAN |
| * .. |
* .. |
| * .. Intrinsic Functions .. |
* .. Intrinsic Functions .. |
| INTRINSIC ABS, MAX, SQRT |
INTRINSIC ABS, SQRT |
| * .. |
* .. |
| * .. Executable Statements .. |
* .. Executable Statements .. |
| * |
* |
|
Line 167
|
Line 167
|
| IF( LSAME( UPLO, 'U' ) ) THEN |
IF( LSAME( UPLO, 'U' ) ) THEN |
| DO 20 J = 1, N |
DO 20 J = 1, N |
| DO 10 I = 1, J |
DO 10 I = 1, J |
| VALUE = MAX( VALUE, ABS( A( I, J ) ) ) |
SUM = ABS( A( I, J ) ) |
| |
IF( VALUE .LT. SUM .OR. DISNAN( SUM ) ) VALUE = SUM |
| 10 CONTINUE |
10 CONTINUE |
| 20 CONTINUE |
20 CONTINUE |
| ELSE |
ELSE |
| DO 40 J = 1, N |
DO 40 J = 1, N |
| DO 30 I = J, N |
DO 30 I = J, N |
| VALUE = MAX( VALUE, ABS( A( I, J ) ) ) |
SUM = ABS( A( I, J ) ) |
| |
IF( VALUE .LT. SUM .OR. DISNAN( SUM ) ) VALUE = SUM |
| 30 CONTINUE |
30 CONTINUE |
| 40 CONTINUE |
40 CONTINUE |
| END IF |
END IF |
|
Line 194
|
Line 196
|
| WORK( J ) = SUM + ABS( A( J, J ) ) |
WORK( J ) = SUM + ABS( A( J, J ) ) |
| 60 CONTINUE |
60 CONTINUE |
| DO 70 I = 1, N |
DO 70 I = 1, N |
| VALUE = MAX( VALUE, WORK( I ) ) |
SUM = WORK( I ) |
| |
IF( VALUE .LT. SUM .OR. DISNAN( SUM ) ) VALUE = SUM |
| 70 CONTINUE |
70 CONTINUE |
| ELSE |
ELSE |
| DO 80 I = 1, N |
DO 80 I = 1, N |
|
Line 207
|
Line 210
|
| SUM = SUM + ABSA |
SUM = SUM + ABSA |
| WORK( I ) = WORK( I ) + ABSA |
WORK( I ) = WORK( I ) + ABSA |
| 90 CONTINUE |
90 CONTINUE |
| VALUE = MAX( VALUE, SUM ) |
IF( VALUE .LT. SUM .OR. DISNAN( SUM ) ) VALUE = SUM |
| 100 CONTINUE |
100 CONTINUE |
| END IF |
END IF |
| ELSE IF( ( LSAME( NORM, 'F' ) ) .OR. ( LSAME( NORM, 'E' ) ) ) THEN |
ELSE IF( ( LSAME( NORM, 'F' ) ) .OR. ( LSAME( NORM, 'E' ) ) ) THEN |
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to dlansy.f CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [local] / rpl / lapack / lapack