Matrix completion of a partially revealed 5 by 5 matrix with rank-1. Left: observed incomplete matrix; Right: matrix completion result. Matrix completion is the task of filling in the missing entries of a partially observed matrix, which is equivalent to performing data imputation in statistics. A wide range of datasets are naturally organized in matrix form. One example is the movie-ratings matri
![Matrix completion - Wikipedia](https://cdn-ak-scissors.b.st-hatena.com/image/square/f4e48161cc2c07f6a2b452f1480dec69975b427d/height=288;version=1;width=512/https%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2Fthumb%2Fb%2Fb1%2FRank-1-matrix-completion.png%2F1200px-Rank-1-matrix-completion.png)