Given a 2 dimensional matrix, find minimum cost path to reach bottom right from top left provided you can only from down and right. For a 5 * 5 matrix ...
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其他好文 时间:
2017-08-26 10:12:34
阅读次数:
121
参考: 如何通俗易懂地解释「协方差」与「相关系数」的概念?(非常通俗易懂) 浅谈协方差矩阵 方差(variance) 集合中各个数据与平均数之差的平方的平均数。在概率论与数理统计中,方差(Variance)用来度量随机变量和其数学期望(即均值)之间的偏离程度。 方差越大,数据的离散程度就越大。 协方... ...
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其他好文 时间:
2017-08-25 21:37:29
阅读次数:
179
chapter 4. Transform p54 affine transform p57 all rotation matrices have a determinant of one and are orthogonal p59 scale,reflection matrix p62 Rigid ...
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其他好文 时间:
2017-08-23 13:48:00
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131
Given a 2D immutable array, Write an efficient program to support any given sub-rectangle sum query in this 2D matrix. A simple solution is to add eac ...
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其他好文 时间:
2017-08-22 13:18:24
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145
PCA (Principal Component Analysis) 主成份分析 也称为卡尔胡宁-勒夫变换(Karhunen-Loeve Transform),是一种用于探索高维数据结构的技术。PCA通常用于高维数据集的探索与可视化。还可以用于数据压缩,数据预处理等。PCA可以把可能具有相关性的高维 ...
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编程语言 时间:
2017-08-22 01:50:08
阅读次数:
521
Angel was caught by the MOLIGPY! He was put in prison by Moligpy. The prison is described as a N * M (N, M <= 200) matrix. There are WALLs, ROADs, and ...
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其他好文 时间:
2017-08-22 00:20:03
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184
Summer is coming! It's time for Iahub and Iahubina to work out, as they both want to look hot at the beach. The gym where they go is a matrix a with n ...
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其他好文 时间:
2017-08-21 21:56:51
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302
Given a N × N matrix A, whose element in the i-th row and j-th column Aij is an number that equals i2 + 100000 × i + j2 - 100000 × j + i × j, you are ...
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其他好文 时间:
2017-08-21 21:56:33
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280
题目描述 查找两个字符串a,b中的最长公共子串。若有多个,输出在较短串中最先出现的那个。 输入描述: 输入两个字符串 输出描述: 返回重复出现的字符 示例1 输入 abcdefghijklmnop abcsafjklmnopqrstuvw 输出 jklmnop 查找两个字符串a,b中的最长公共子串。 ...
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其他好文 时间:
2017-08-21 13:34:25
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348
Summer is coming! It's time for Iahub and Iahubina to work out, as they both want to look hot at the beach. The gym where they go is a matrix a with n ...
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其他好文 时间:
2017-08-20 18:30:27
阅读次数:
192