ドキュメントセクション
MQL5 リファレンス行列とベクトルのメソッドOpenBLASBLAS Level 2BlasL2SyR 

BlasL2SyR

Performs a rank-1 update of a symmetric n-by-n matrix.

AU = alpha * x * x**T + A

BLAS function SYR.

Computing for type matrix<double>

bool  matrix::BlasL2SyR(
  double       alpha,       // scalar multiplier alpha
  vector&       X,         // vector X
  matrix&       AU         // updated matrix A
  );

Computing for type matrix<float>

bool  matrixf::BlasL2SyR(
  float         alpha,       // scalar multiplier alpha
  vectorf&     X,         // vector X
  matrixf&     AU         // updated matrix A
  );

Parameters

alpha

[in]  Scalar multiplier alpha.

X

[in]  Vector x of size n.

AU

[out]  Updated matrix A.

Return Value

Return true if successful, otherwise false in case of an error.

Note

The input can be a symmetric, upper triangular or lower triangular matrix. Triangular matrices are assumed to be symmetric.