fuchsia / third_party / github.com / gonum / gonum / ffd939f8ca292b53f56531f190a8ae1e7cdea92c / . / mat / consts.go

// Copyright ©2016 The gonum Authors. All rights reserved. | |

// Use of this source code is governed by a BSD-style | |

// license that can be found in the LICENSE file. | |

package mat | |

// TriKind represents the triangularity of the matrix. | |

type TriKind bool | |

const ( | |

// Upper specifies an upper triangular matrix. | |

Upper TriKind = true | |

// Lower specifies a lower triangular matrix. | |

Lower TriKind = false | |

) | |

// SVDKind specifies the treatment of singular vectors during an SVD | |

// factorization. | |

type SVDKind int | |

const ( | |

// SVDNone specifies that no singular vectors should be computed during | |

// the decomposition. | |

SVDNone SVDKind = iota + 1 | |

// SVDThin computes the thin singular vectors, that is, it computes | |

// A = U~ * Σ * V~^T | |

// where U~ is of size m×min(m,n), Σ is a diagonal matrix of size min(m,n)×min(m,n) | |

// and V~ is of size n×min(m,n). | |

SVDThin | |

// SVDFull computes the full singular value decomposition, | |

// A = U * Σ * V^T | |

// where U is of size m×m, Σ is an m×n diagonal matrix, and V is an n×n matrix. | |

SVDFull | |

) | |

// GSVDKind specifies the treatment of singular vectors during a GSVD | |

// factorization. | |

type GSVDKind int | |

const ( | |

// GSVDU specifies that the U singular vectors should be computed during | |

// the decomposition. | |

GSVDU GSVDKind = 1 << iota | |

// GSVDV specifies that the V singular vectors should be computed during | |

// the decomposition. | |

GSVDV | |

// GSVDQ specifies that the Q singular vectors should be computed during | |

// the decomposition. | |

GSVDQ | |

// GSVDNone specifies that no singular vector should be computed during | |

// the decomposition. | |

GSVDNone | |

) |