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数学之路-python计算实战(5)-初识numpy以及pypy下执行numpy
NNumPy系统是Python的一种开源的数字扩展。这样的工具可用来存储和处理大型矩阵,比Python自身的嵌套列表(nested list structure)结构要高效的多(该结构也能够用来表示矩阵(matrix))。据说NumPy将Python相当于变成一种免费的更强大的MatLab系统。一个...
分类:编程语言   时间:2016-01-05 20:48:31    阅读次数:211
lintcode 中等题:search a 2d matrix II 搜索二维矩阵II
题目搜索二维矩阵 II写出一个高效的算法来搜索m×n矩阵中的值,返回这个值出现的次数。这个矩阵具有以下特性:每行中的整数从左到右是排序的。每一列的整数从上到下是排序的。在每一行或每一列中没有重复的整数。样例考虑下列矩阵:[ [1, 3, 5, 7], [2, 4, 7, 8], [3, 5, ...
分类:其他好文   时间:2016-01-05 20:40:16    阅读次数:234
Android ImageView的scaleType(图片比例类型)属性与adjustViewBounds(调整视图边界)属性
Android ImageView的scaleType属性与adjustViewBounds属性 实用性很强的属性经典总结 一、首先:ImageView的scaleType的属性有好几种,分别是matrix(默认)、center、centerCrop、centerInside、fitCenter.....
分类:移动开发   时间:2016-01-04 13:13:49    阅读次数:264
Sparse Matrix Multiplication
Given twosparse matricesAandB, return the result ofAB.You may assume thatA's column number is equal toB's row number.Example:A = [ [ 1, 0, 0], [-1, .....
分类:其他好文   时间:2016-01-04 06:39:09    阅读次数:126
[LeetCode]题解(python):074-Search a 2D Matrix
题目来源https://leetcode.com/problems/search-a-2d-matrix/Write an efficient algorithm that searches for a value in anmxnmatrix. This matrix has the follow...
分类:编程语言   时间:2016-01-04 00:02:23    阅读次数:266
LeetCode - Maximal Rectangle
题目:Given a 2D binary matrix filled with 0's and 1's, find the largest rectangle containing all ones and return its area.思路:类似于上一篇文章中的方法一,对每列的左右拓展极限进行记...
分类:其他好文   时间:2016-01-03 18:20:50    阅读次数:110
Rotate Image LeetCode
问题:You are given an n x n 2D matrix representing an image.Rotate the image by 90 degrees (clockwise).Follow up:Could you do this in-place?分析:二维数组a[n][...
分类:其他好文   时间:2016-01-02 14:14:29    阅读次数:207
CSS3 笔记四(Transforms)
CSS3 2D Transforms Methodstranslate()rotate()scale()skewX()skewY()matrix()1> translateThe translate() method moves an element from its current positio...
分类:Web程序   时间:2016-01-01 16:51:35    阅读次数:256
LeetCode - Search a 2D Matrix
题目:Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: Integers in each row are sorte...
分类:其他好文   时间:2016-01-01 14:51:03    阅读次数:137
LeetCode - Set Matrix Zeroes
题目:Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place.Follow up: Did you use extra space?A straight forward ...
分类:其他好文   时间:2016-01-01 11:02:14    阅读次数:170
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