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深度学习 Deep Learning UFLDL 最新Tutorial 学习笔记 3:Vectorization
1 Vectorization 简述Vectorization 翻译过来就是向量化,各简单的理解就是实现矩阵计算。为什么MATLAB叫MATLAB?大概就是Matrix Lab,最根本的区别于其他通用语言的地方就是MATLAB可以用最直观的方式实现矩阵运算,MATLAB的变量都可以是矩阵。通过Vectorization,我们可以将代码变得极其简洁,虽然简洁带来的问题就是其他人看你代码就需要研究一番...
分类:其他好文   时间:2014-11-19 22:22:52    阅读次数:370
Set Matrix Zeroes
Given amxnmatrix, if an element is 0, set its entire row and column to 0. Do it in place.click to show follow up.Follow up:Did you use extra space?A s...
分类:其他好文   时间:2014-11-19 20:25:11    阅读次数:248
[Bhatia.Matrix Analysis.Solutions to Exercises and Problems]ExI.4.1
Let $x,y,z$ be linearly independent vectors in $\scrH$. Find a necessary and sufficient condition that a vector $w$ mush satisfy in order that the bil...
分类:其他好文   时间:2014-11-19 18:28:24    阅读次数:183
Search a 2D Matrix
Write an efficient algorithm that searches for a value in anmxnmatrix. This matrix has the following properties:Integers in each row are sorted from l...
分类:其他好文   时间:2014-11-19 18:24:27    阅读次数:147
[Bhatia.Matrix Analysis.Solutions to Exercises and Problems]ExI.4.6
Let $A$ and $B$ be two matrices (not necessarily of the same size). Relative to the lexicographically ordered basis on the space of tensors, the matri...
分类:其他好文   时间:2014-11-19 18:20:50    阅读次数:142
[Bhatia.Matrix Analysis.Solutions to Exercises and Problems]ExI.4.4
(1). There is a natural isomorphism between the spaces $\scrH\otimes \scrH^*$ and $\scrL(\scrH,\scrK)$ in which the elementary tensor $k\otimes h^*$co...
分类:其他好文   时间:2014-11-19 18:05:06    阅读次数:326
[Bhatia.Matrix Analysis.Solutions to Exercises and Problems]ExI.4.5
Suppose it is known that $\scrM$ is an invariant subspace for $A$. What invariant subspaces for $A\otimes A$ can be obtained from this information alo...
分类:其他好文   时间:2014-11-19 17:55:24    阅读次数:191
LeetCode——Spiral Matrix II
Given an integer n, generate a square matrix filled with elements from 1 to n2 in spiral order. For example, Given n = 3, You should return the following matrix: [ [ 1, 2, 3 ], [ 8, 9, 4 ], [...
分类:其他好文   时间:2014-11-19 16:05:08    阅读次数:143
POJ 3744
矩阵快速乘求概率,不难。但有注意的一点是,一定要注意地雷连着的情况,一旦出现两个雷相邻,就必定为0了。#include #include #include #include using namespace std;int pos[15];struct matrix{ double m[3][3];}...
分类:其他好文   时间:2014-11-19 14:00:56    阅读次数:145
LeetCode——Spiral Matrix
Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order. For example, Given the following matrix: [ [ 1, 2, 3 ], [ 4, 5, 6 ], [ 7, 8, 9 ] ] ...
分类:其他好文   时间:2014-11-19 12:42:43    阅读次数:149
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