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...
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其他好文 时间:
2014-11-19 22:22:52
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370
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...
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2014-11-19 20:25:11
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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...
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2014-11-19 18:28:24
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183
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...
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2014-11-19 18:24:27
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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...
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2014-11-19 18:20:50
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(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...
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2014-11-19 18:05:06
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326
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...
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其他好文 时间:
2014-11-19 17:55:24
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191
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 ],
[...
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其他好文 时间:
2014-11-19 16:05:08
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143
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];}...
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其他好文 时间:
2014-11-19 14:00:56
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145
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 ]
]
...
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其他好文 时间:
2014-11-19 12:42:43
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149