LAPACK

LAPACK Operations

Interactive demos of real LAPACK routines from stdlib — matrix copy, row permutations, scaled norms, tridiagonal factorization, and machine parameters.

Routine

Region (uplo)

Matrix A (rows on new lines)

Result

dlacpy(uplo='all') — copied entire triangle

Copies all or part of matrix A into matrix B. "upper" copies the upper triangle, "lower" copies the lower triangle, "all" copies the full matrix.

Input A

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

Output B

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

LAPACK Routines Reference

DLACPY

Copy matrix region

DLASWP

Row interchanges

DLASSQ

Scaled sum of squares

DPTTRF

Tridiagonal LDLᵀ factorization

DLASET

Initialize matrix

DLAMCH

Machine parameters