statistics data analysis and decision modeling

Distribution When N of the sample distribution is large, the extreme distribution is used as an approximation of the sample distribution. This extreme distribution is called a progressive distribution.Approximate distribution obtained by Random Simulation Distribution of observed values satisfied by repeated experiments.Several Important Distributions derived from normal distribution, Chi-square distribution, tdistribution, and F distribution It plays an important role in variance

Deep and simple data analysis is one of the "deep and simple" series of American o'reilly press. This series is characterized by a lot of thoughts on how to make readers more comfortable to read and remember more content in the book. Although the book is thick, there are many illustrations. Illustrations and texts are often mixed together without obvious boundaries. It is really easy to read. It is easier t

#-*-coding:utf-8-*-#analysis of food and beverage sales data statistics from __future__ Importprint_functionImportPandas as Pdcatering_sale='.. /data/catering_sale.xls' #Dining Datadata = Pd.read_excel (Catering_sale, Index_col = u'Date')#reading data, specifying "date" as i

Seeing a variety of third-party services, I would like to toss. This article briefly explains how to add the site statistics function to your blog. Baidu Statistics Login Baidu Statistics Open Baidu Statistics, enter the Baidu account password can be. Add a Web site To the "Manage" module in the Personal center, clic

The Pandas object has some common mathematical and statistical methods. For example, the sum () method, which makes the column subtotal: the sum () method passed in Axis=1 is specified as a horizontal summary, which is subtotal: Idxmax () gets the index of the maximum value: There is also a rollup that is cumulative, cumsum (), compared to it and Su The difference between M ():The unique () method is used to return only values in the data: the Value_

!~/http:\/\/[^/]* ' "$domain" '/{url[$11]++}end{for (k in URL) {print url[k],k}} ' ${log _path} | Sort-rn | Head-20 ' Notfound= ' awk ' $ = = 404 {url[$7]++}end{for (k in URL) {print url[k],k}} ' ${log_path} | Sort-rn | Head-20 ' Spider= ' awk-f ' "' $ ~/baiduspider/{spider[" Baiduspider "]++} $ ~/googlebot/{spider[" Googlebot "]++}end{for (k in SPID ER) {print k,spider[k]} ' ${log_path} ' Search= ' awk-f ' "' $ ~/http:\/\/www\.baidu\.com/{search[" Baidu_search "]++} $ ~/http:\/\/www\.google\

I have an ERP platform. the back-end database is mysql, and the statistics reports in ERP are relatively small. leaders sometimes want to make some adjustments based on their business conditions, and the relationship between data indicators also changes frequently, modifying the reports in ERP is very troublesome, and you need to modify the code. I want to find a simple and easy-to-use Report tool to take o

Reprint Please indicate the source: http://blog.csdn.net/mxway/article/details/21321541 In the search engine in the usual number of keywords appear in the statistics, this article analyzes the use of C + + STL map for statistics, and the use of Dictionary tree statistics in the running speed, space and applicable occasions for