Package smile.linalg

package smile.linalg

Type-safe enumerations and constants for BLAS, LAPACK, and ARPACK.

All classes in this package are thin, allocation-free wrappers around the integer and byte flags consumed by the native libraries. Using these enums instead of raw integer literals makes call sites self-documenting and prevents hard-to-detect argument-ordering bugs.

Enum overview

smile.linalg enumerations

Enum	Purpose	Used by
Order	Matrix memory layout: ROW_MAJOR (C) vs COL_MAJOR (Fortran)	CBLAS, CLAPACK
Transpose	Matrix operation: none / transpose / conjugate-transpose	CBLAS, CLAPACK
UPLO	Which triangle is stored for symmetric/triangular matrices	CBLAS, CLAPACK
Diag	Whether a triangular matrix has a unit diagonal	CBLAS, CLAPACK
Side	Whether a symmetric matrix multiplies on the left or right	CBLAS
EVDJob	Whether eigenvectors are computed (dgeev, dsyevd)	CLAPACK
SVDJob	Which singular vectors are computed (dgesdd)	CLAPACK
EigenRange	Range of eigenvalues to compute (dsyevr)	CLAPACK

Native library bindings

The sub-packages contain Java bindings generated by jextract (Java Foreign Function & Memory API, Java 22+):

• smile.linalg.blas — CBLAS (OpenBLAS / Accelerate / MKL)
• smile.linalg.lapack — CLAPACK (OpenBLAS / Accelerate / MKL)
• smile.linalg.arpack — ARPACK (sparse eigendecomposition)

The native library name is controlled at runtime via system properties:

• smile.lib.blas — overrides the BLAS library name (default: openblas on Linux, blas on macOS, libopenblas on Windows).

Related Packages

Package	Description
smile.linalg.arpack
smile.linalg.blas
smile.linalg.lapack

Enum Classes

Class	Description
Diag	The flag if a triangular matrix has unit diagonal elements.
EigenRange	The option of eigenvalue range for LAPACK symmetric eigensolver routines (e.g., dsyevr, ssyevr).
EVDJob	The option controlling whether eigenvectors are computed by LAPACK eigenvalue routines (e.g., dgeev, dsyevd).
Order	Matrix memory layout (storage order).
Side	The side on which a symmetric matrix appears in a matrix-matrix operation.
SVDJob	The option controlling which singular vectors are computed by LAPACK routines such as dgesdd and dgesvd.
Transpose	Matrix transpose operation passed to BLAS/LAPACK routines.
UPLO	Which triangular part of a symmetric or triangular matrix is stored.