矩阵分解(rank decomposition)文章代码汇总

矩阵分解(rank decomposition)

本文收集了现有矩阵分解的几乎所有算法和应用,原文链接:https://sites.google.com/site/igorcarron2/matrixfactorizations

Matrix Decompositions has a long history and generally centers around a set of known factorizations such as LU, QR, SVD and eigendecompositions. More recent factorizations have seen the light of the day with work started with the advent of NMF, k-means and related algorithm [1]. However, with the advent of new methods based on random projections and convex optimization that started in part in the compressive sensing literature, we are seeing another surge of very diverse algorithms dedicated to many different kinds of matrix factorizations with new constraints based on rank and/or positivity and/or sparsity,… As a result of this large increase in interest, I have decided to keep a list of them here following the success of the big picture in compressive sensing.

The sources for this list include the following most excellent sites: Stephen Becker’s pageRaghunandan H. Keshavan‘ s pageNuclear Norm and Matrix Recovery through SDP by Christoph HelmbergArvind Ganesh‘s Low-Rank Matrix Recovery and Completion via Convex Optimization who provide more in-depth additional information.  Additional codes were featured also on Nuit Blanche. The following people provided additional inputs: Olivier GriselMatthieu Puigt.

Most of the algorithms listed below generally rely on using the nuclear norm as a proxy to the rank functional. It may not be optimal. Currently, CVX ( Michael Grant and Stephen  Boyd) consistently allows one to explore other proxies for the rank functional such as thelog-det as found by Maryam  FazellHaitham HindiStephen Boyd. ** is used to show that the algorithm uses another heuristic than the nuclear norm.

In terms of notations, A refers to a matrix, L refers to a low rank matrix, S a sparse one and N to a noisy one. This page lists the different codes that implement the following matrix factorizations: Matrix Completion, Robust PCA , Noisy Robust PCA, Sparse PCA, NMF, Dictionary Learning, MMV, Randomized Algorithms and other factorizations. Some of these toolboxes can sometimes implement several of these decompositions and are listed accordingly. Before I list algorithm here, I generally feature them on Nuit Blanche under the MF tag: http://nuit-blanche.blogspot.com/search/label/MF or. you can also subscribe to the Nuit Blanche feed,

Matrix Completion, A = H.*L with H a known mask, L unknown solve for L lowest rank possible

The idea of this approach is to complete the unknown coefficients of a matrix based on the fact that the matrix is low rank:

Noisy Robust PCA,  A = L + S + N with L, S, N unknown, solve for L low rank, S sparse, N noise

Robust PCA : A = L + S with L, S, N unknown, solve for L low rank, S sparse

Sparse PCA: A = DX  with unknown D and X, solve for sparse D

Sparse PCA on wikipedia

  • R. Jenatton, G. Obozinski, F. Bach. Structured Sparse Principal Component Analysis. International Conference on Artificial Intelligence and Statistics (AISTATS). [pdf] [code]
  • SPAMs
  • DSPCA: Sparse PCA using SDP . Code ishere.
  • PathPCA: A fast greedy algorithm for Sparse PCA. The code is here.

Dictionary Learning: A = DX  with unknown D and X, solve for sparse X

Some implementation of dictionary learning implement the NMF

NMF: A = DX with unknown D and X, solve for elements of D,X > 0

Non-negative Matrix Factorization (NMF) on wikipedia

Multiple Measurement Vector (MMV) Y = A X with unknown X and rows of X are sparse.

Blind Source Separation (BSS) Y = A X with unknown A and X and statistical independence between columns of X or subspaces of columns of X

Include Independent Component Analysis (ICA), Independent Subspace Analysis (ISA), and Sparse Component Analysis (SCA). There are many available codes for ICA and some for SCA. Here is a non-exhaustive list of some famous ones (which are not limited to linear instantaneous mixtures). TBC

ICA:

SCA:

Randomized Algorithms

These algorithms uses generally random projections to shrink very large problems into smaller ones that can be amenable to traditional matrix factorization methods.

Resource
Randomized algorithms for matrices and data by Michael W. Mahoney
Randomized Algorithms for Low-Rank Matrix Decomposition

Other factorization

D(T(.)) = L + E with unknown L, E and unknown transformation T and solve for transformation T, Low Rank L and Noise E

Frameworks featuring advanced Matrix factorizations

For the time being, few have integrated the most recent factorizations.

GraphLab / Hadoop

Books

Example of use

Sources

Arvind Ganesh‘s Low-Rank Matrix Recovery and Completion via Convex Optimization

Relevant links

Reference:

A Unified View of Matrix Factorization Models by Ajit P. Singh and Geoffrey J. Gordon

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