naginterfaces.library.blas.dlangb¶
- naginterfaces.library.blas.dlangb(norm, kl, ku, ab)[source]¶
dlangb
returns the value of the -norm, the -norm, the Frobenius norm, or the maximum absolute value of the elements of a real band matrix.For full information please refer to the NAG Library document for f06rb
https://support.nag.com/numeric/nl/nagdoc_30.1/flhtml/f06/f06rbf.html
- Parameters
- normstr, length 1
Specifies the value to be returned.
or
The -norm.
The -norm.
or
The Frobenius (or Euclidean) norm.
The value (not a norm).
- klint
, the number of subdiagonals within the band of .
- kuint
, the number of superdiagonals within the band of .
- abfloat, array-like, shape
The band matrix .
- Returns
- nrmfloat
The value of the -norm, the -norm, the Frobenius norm, or the maximum absolute value of the elements of the real band matrix.
- Raises
- NagValueError
- (errno )
On entry, error in parameter .
Constraint: , , , , or .
- (errno )
On entry, error in parameter .
Constraint: .
- (errno )
On entry, error in parameter .
Constraint: .
- (errno )
On entry, error in parameter .
Constraint: .
- Notes
No equivalent traditional C interface for this routine exists in the NAG Library.