因为整理的时候用的是word, 所以就直接传pdf了. 1.关于范数和矩阵求导.pdf 参考的主要是网上的几个博文. 2.稀疏表示的简单整理.pdf 参考论文为: A Survey of Sparse Representation: Algorithms and Applications 因为原文有一些地方有笔误和遗漏,所以按自己的理解做了一些改正,仅供参考.
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今天推导公式,发现居然有对矩阵的求导,狂汗--完全不会.不过还好网上有人总结了.吼吼,赶紧搬过来收藏备份. 基本公式:Y = A * X --> DY/DX = A'Y = X * A --> DY/DX = AY = A' * X * B --> DY/DX = A * B'Y = A' * X' * B --> DY/DX = B * A' 1. 矩阵Y对标量x求导: 相当于每个元素求导数后转置一下,注意M×N矩阵求导后变成N×M了 Y = [y(ij)] --> dY/
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