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R语言实战读书笔记(七)基本统计分析
summary()sapply(x,fun,options):对数据框或矩阵中的每一个向量进行统计meansd:标准差var:方差min:max:median:length:range:quantile:vars <- c("mpg", "hp", "wt")head(mtcars[vars])su...
分类:编程语言   时间:2015-11-27 21:53:15    阅读次数:247
[Ural1306] Sequence Median(网上很多题解骗人,这才是对的!业界良心!)
血的教训:1. 尽信题解,不如无题解!2. C++ STL很坑爹。。测试结果分析与比较:#1是我自己写的,使用priority_queue,超内存:#include #include #include #include using namespace std;priority_queue pq;i....
分类:其他好文   时间:2015-11-26 12:33:32    阅读次数:360
HackerRank "Median Updates"
Same as LintCode "Sliding Window Median", but requires more care on details - no trailing zeroes.#include #include #include #include #include #include...
分类:其他好文   时间:2015-11-21 15:49:50    阅读次数:153
Find Median from Data Stream 295
题目链接:https://leetcode.com/problems/find-median-from-data-stream/题目描述: 设计一个类,包含两种操作void addNum(int num) - Add a integer number from the data stream to ...
分类:其他好文   时间:2015-11-20 15:22:14    阅读次数:155
LintCode - Sliding Window Median
Given an array of n integer, and a moving window(size k), move the window at each iteration from the start of the array, find the median of the elemen...
分类:Windows程序   时间:2015-11-20 07:02:24    阅读次数:285
POJ - 3579 Median
二分中间值x,x和大于等于x的值的数量cnt具有单调性,随着x增大,满足cntx #include#include#include#include#include#include#include#include#include#include#include#includeusing namespa...
分类:其他好文   时间:2015-11-19 14:49:48    阅读次数:93
LeetCode Median of Two Sorted Arrays 找中位数(技巧)
题意: 给两个有序(升or降)的数组,求两个数组合并之后的中位数。思路: 按照找第k大的思想,很巧妙。将问题的规模降低,对于每个子问题,k的规模至少减半。考虑其中一个子问题,在两个有序数组中找第k大,我们的目的只是将k的规模减半而已,所以可以对比nums1[k/2]和nums2[k/2]的大小,.....
分类:其他好文   时间:2015-11-16 14:04:52    阅读次数:141
leetcode find median sorted arrays python
# @link http://www.cnblogs.com/zuoyuan/p/3759682.htmlclass Solution(object): def findMedianSortedArrays(self, nums1, nums2): """ :typ...
分类:编程语言   时间:2015-11-08 14:24:30    阅读次数:213
【LeetCode OJ 004】Median of Two Sorted Arrays
题目链接:https://leetcode.com/problems/median-of-two-sorted-arrays/ 题目:There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. The overall ru...
分类:其他好文   时间:2015-11-06 09:46:52    阅读次数:234
【LeetCode OJ】Median of Two Sorted Arrays
题目链接:https://leetcode.com/problems/median-of-two-sorted-arrays/题目:There are two sorted arraysnums1andnums2of size m and n respectively. Find the media...
分类:其他好文   时间:2015-11-04 20:59:15    阅读次数:185
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