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# Sung-Eun Jo

### TOP RnD Center

Active since 2014

PhD. Electrical Eng
Love to code Matlab and RTL.
Professional Interests: matrix computation, verilog RTL code, Fortran library.

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Question

Odd behaviour of 2x2-matrix and 2x1-vector operation
Consider a 2x2 matrix A with columns uncorrelated, and a vector x: A = [ a b ] [-b' a'] x = [ a'] [ b...

9 years ago | 1 answer | 0

### 1

Submitted

SVD of 2x2 complex matrix based on two rotation matrices
ROT_SVD2X2 computes the complex rotation matrices for the SVD of a 2-by-2 complex matrix.

Submitted

SVD of a matrix based on Lapack interface
SVD_LAPACK computes the singular value decomposition of a matrix by calling LAPACK subroutines.

Submitted

Trigonometric function errors at pi or pi/2 such as sin(pi) or cos(pi/2)
The constant pi in matlab is a floating-point approximation of 'pi'. There is a remedy for it!

Submitted

QR decomposition with constrained diagonal phases (Lapack interface)
The code computes the QR decomposition with specific diagonal phases.

Submitted

Tridiagonalization of a Hermitian or symmetric matrix based on Lapack interface
The code computes the tridiagonal decomposition of a Hermitian matrix by calling Lapack routines.

Submitted

Bidiagonalization of a matrix based on Lapack interface
The code computes the bidiagonal matrix decomposition of a matrix by calling Lapack routines.