You are given the number of rowsn rowsand number of columnsn colsof a Dbinary matrixwhere all values are initially .Write a functionflipwhich choosesa valueuniformly at random,changes it to ,and then ...
2018-10-12 23:32 2 1969 推荐指数：
We have a two dimensional matrix `A` where each value is `0` or `1`. A move consists of choosing any row or column, and toggling each value ...
学过矩阵理论或者线性代数的肯定知道正交矩阵（orthogonal matrix）是一个非常好的矩阵，为什么这么说？原因有一下几点： 正交矩阵每一列都是单位矩阵，并且两两正交。最简单的正交矩阵就是单位阵。 正交矩阵的逆（inverse）等于正交矩阵的转置（transpose ...
numpy.flipud numpy.flipud(m)[source] Flip array in the up/down direction. Flip the entries in each column in the up/down direction. Rows ...
最近一个月来一直在看Google排序的核心算法---PageRank排序算法[1][2]，在多篇论文中涉及到图论、马尔可夫链的相关性质说明与应用[3][4][5]，而最为关键，一直让我迷惑的一句话是"A stochastic matrix has principal/primary ...
向量的平移，比较简单。 缩放也较为简单 矩阵如何进行计算呢？之前的文章中有简介一种方法，把行旋转一下，然后与右侧对应相乘。在谷歌图片搜索旋转矩阵时，看到这张动图，觉得表述的很清晰了。 稍微复杂一点的是旋转，如果只是二维也很简单（因为很直观），但因为是三维 ...
In MATLAB, there is a very useful function called 'reshape', which can reshape a matrix into a new one with different size but keep its original ...
Given a matrix consists of 0 and 1, find the distance of the nearest 0 for each cell. The distance between two adjacent cells is 1. Example ...
You are playing the following Flip Game with your friend: Given a string that contains only these two characters: + and -, you and your friend ...
