statistics 2 for dummies

columns, where the random number is generated by the standard uniform distribution (U (0,1)).RNG (' Default '); % for ReproducibiltyX = rand (20000,3);Use Ward's linkage to generate hierarchical clustering trees. Set ' savememory ' to ' on ' to construct the cluster but not to calculate the distance matrix.c = Clusterdata (X, ' linkage ', ' ward ', ' savememory ', ' on ', ' Maxclust ', 4);Plot the data into a graphic, where each category corresponds to a different color.Scatter3 (X (:, 1), X (:

1. The Calculate the variance of a certain set of data:　　Pts_mean = SUM (nba_stats["pts"])/len (nba_stats[' pts ')point_variance = 0For I in nba_stats[' pts ']:difference = (i-pts_mean) * * 2Point_variance + = DifferencePoint_variance = Point_variance/len (nba_stats[' pts ')2. Something to the power have the highest pirority, then mutiply and Devide, the Add and subsract.3. Raise to the 11 fifth power. Assign the result to e . ( 11**5)Take the fourth

; - while(C=cin.Get()) the { * if((c>='a' c'Z') || (c>='A' c'Z') || c==' '|| c=='\ n') $Str+=c;//Remove SymbolsPanax Notoginseng if(c=='\ n') - Break; the } + //output A string that removes non-English characters A the + for(intj=0; str[j]!=' /'; j + +) - { $ if(str[j]>='A'str[j]'Z') $ { -str[j]+= +;//Uppercase Letter ASCLL code +32 converted to lowercase - } the } - //output converted to lowercase string

; - while(*letter_point++) Wu { - if(*letter_point = =','|| *letter_point = ='.') About*letter_point =0; $ } - If_repet (WOR_PO); - } - } A + voidStat_alone (Char*master_p) the { - Catch_letter (master_p); $ sort (Sort_word.begin (), Sort_word.end ()); thecout "Total:"Endl; the for(Vector) theprintf"Word:%-15s Frequency:%d\n", Iter->word_point, iter->Frequency); theTotal =0; - sort_word.clear (); in } the the voidMainintArgvChar**argc) About {

question : When given n elements in a static table (such as an array), how can I quickly find the number of bits, Min, max, I small?The first idea is to sort the array elements first and then find the small element I. This is feasible, but the comparison of the fastest also requires O (NLGN), can be solved in linear time. This is the random divide-and-conquer method-Random selection.thought : Use random partitioning (described in quick Sort) to find the principal r, so that elements less than or

PLSQL _ Statistical Information Series 2 _ errors in program performance (CASE) and plsql statistics Created By BaoXinjian I. Summary In a stable database with performance, all jobs must be completed within a certain period of time. In the past, in a banking system, a job was originally completed in 30minutes, but after 3hours, it was still running Excluding the impact of data size changes, you need to che

#include string>#include#includeusing namespaceStd;std::vectorint>v;intbigarr[10000];inthelparr[10000];intPartitionint* Arr,intLeftintRight );intQSort (int* Arr,intLeftintRight ) { if(Left >=Right ) { return 0; } intPartionidx =partition (arr, left, right); intLeftcmpnum = QSort (Arr,left, Partionidx-1 ); intRightcmpnum = QSort (arr, Partionidx +1, right); return(right-left) + Leftcmpnum +Rightcmpnum;}intPartitionint* Arr,intLeftintRight ) { if(Left >=Right ) { returnLeft

There are three main logging subsystems in the Linux operating system:(1) Connection time log(2) Process statistics log(3) System and service logsThe connection time log and the process statistic log are driven by the Rsyslog (Legacy syslog) log service, and the system and service logs are driven and managed by the corresponding network service;Process Statistics

search behavior of the law, in order to enhance their own word segmentation technology. For this purpose, a large number of users are required to search for data to get. But how to get it? Yahoo itself has a search engine that can be counted to a certain amount of data. But not quite. Baidu has the data, Google's grasp of the data is Yahoo need. How do you get the data? Money to buy? How much money do you have to buy? to steal? Not afraid of breaking the law? That's all we have to tell him. So

topic, and then the use of randomization did go away.The second version I don't know how to use randomization-. -The third version is the choice of X on the foot (X=a[r] to X=random (l,r), swap (a[x],a[r]); x=a[r];) So you randomly select a number from L,r as x instead of the original a[r].The 3rd, similar to the optimization of merge sort, is to use the insertion sort when dividing into a small enough set, which has been said in another article, which should be used when dividing the collectio

Character Statistics 2 Time limit:1000ms Memory limit:65536kb Submit statistic Problem Description Enter an English sentence to output the most frequently occurring characters and the number of occurrences in the sentence. Input The input data contains multiple test instances, each of which is an English sentence that is no more than 100 in length and occupies one row. Output Line-by-row output the most occ

Original: http://www.open-open.com/code/view/1456919325625ImportJava.util.Iterator;ImportJava.util.Map;ImportJava.util.Set;ImportJava.util.TreeMap;/** Count the number of occurrences of each letter in the ABACBACDADBC, the output format is: A (4) B (3) C (3) d (2) * * The reason for selecting TreeMap is: Key is not duplicated and sorted out in order * idea: * 1. Convert string Abacbacdadbc to Character array * 2