data cleansing ppt

Data cleansing Note: sorts strings to dates (A Date Field is processed in multiple formats) Background] When cleaning data, it is found that there are three types of data formats in a certain time field of the source system. It is suspected that this is caused by inconsistent source

Data cleansing Note: determines whether it is a digital Function Background] When data is being processed, a large number of Chinese characters or meaningless English characters appear when inserting data into a field of the number type. Check that all data is junk and nee

Data cleansing Note: When multiple users call the same function, note that multiple users Original Works are from the blog of "Deep Blue blog". You are welcome to repost them. You must specify the source when you repost them. Otherwise, you have the right to pursue legal liability for copyright. Deep Blue blog: http://blog.csdn.net/huangyanlong/article/details/46340515 Background] During

Data Cleaning[edit] Once processed and organized, the data may be incomplete, contain duplicates, or contain errors. The need for data cleaning would arise from problems in the the-the-same-data is entered and stored. Data cleaning is the process of preventing and correc

Website Log Analysis Project case (i) Project description: http://www.cnblogs.com/edisonchou/p/4449082.html Website Log Analysis Project case (ii) Data cleansing: Current Page Website Log Analysis Project case (iii) statistical analysis: http://www.cnblogs.com/edisonchou/p/4464349.html I. Data situation analysis 1.1

] # sed ' 1c Hi ' AB #第一行代替为HiHiRuby is me,welcome to my blog.End[[email protected] ruby] # sed ' 1,2c Hi ' ab #第一行到第二行代替为HiHiEndReplace a section in a rowFormat: sed ' s/string to replace/new string/g ' (the string to replace can be used with regular expressions)[[email protected] ruby] # sed-n '/ruby/p ' ab | Sed ' s/ruby/bird/g ' #替换ruby为bird[[email protected] ruby] # sed-n '/ruby/p ' ab | Sed ' s/ruby//g ' #删除rubyInsert[[email protected] ruby] # sed-i ' $a bye ' ab #在文件ab中最后一行直接输入 "Bye"[emai

For details, please refer to: micro-bo Data Cleaning (Java version) This article is an introduction to the Python version, and only the Data Cleansing section does not contain operations on Excel, including removing HTML tags and removing URL addresses from the information. Python's code is much simpler than Java. #-*-Coding:utf-8-*-' Created on December 10, 2

Data cleansing, using Python data to clean the CVS with Chinese characters, the intention is to use a dictionary corresponding to Chinese characters, that is, the key value is the Chinese characters, value is index, self-increment can be, using the dictionary data structure does not duplicate the key value of the attri

(); String status = Trim.split ("") [0]; return status; } Private STring parseURL (String line) {final int first = Line.indexof ("\" "); final int last = Line.lastindexof ("\" "); String URL = line.substring (first + 1, last); return URL; private string Parsetime (string line) {Final int first = Line.indexof ("["); final int last = Line.indexof ("+0800]"); String time = line.substring (first + 1, last). Trim ();

Data Source acquisition: Https://www.kaggle.com/datasets 1, Look at the some basic stats for the ‘imdb_score’ column: data.imdb_score.describe()Select a column: data[‘movie_title’]Select the first 10 rows of a column: data[‘duration’][:10]Select multiple columns: data[[‘budget’,’gross’]]Select all movies over two hour

1 The description of the problem is that when doing the crawler, the data volume is very large, about BESPA data, assuming that there is a field conmany_name (auction company name), we now need to find out from 5 million data in 50 auction companies,The field is required to be longer than July 1 and less than October 31.2 The solution we first think o

Data cleansing Note: sorts strings to dates (A Date Field is processed in multiple formats ), Original Works are from the blog of "Deep Blue blog". You are welcome to repost them. You must specify the source when you repost them. Otherwise, you have the right to pursue legal liability for copyright. Deep Blue blog: http://blog.csdn.net/huangyanlong/article/details/46513855 Background] When cleaning

Data cleansing Note: String-to-date: Timestamp-caused problems Background] During data extraction, the source "time significance" field data is in "timestamp format" and the field type is string type. However, the target end requires that the data enter the date type and be

); Get URL string[] getUrl = line.split ("\" "); String Firtgeturl = geturl[1].substring (3). Trim (); String Secondgeturl = Geturl[3].trim (); Urlfield = Firtgeturl + "delimiter" + secondgeturl; Get browser string[] Getbrowse = line.split ("\" "); String Strbrowse = getbrowse[5].tostring (); String str = "(khtml, like Gecko)"; int i = Strbrowse.indexof (str); St

Booleanonoptionsitemselected (MenuItem item) {//Handle Action Bar item clicks here. The Action Bar would//automatically handle clicks on the Home/up button, so long//As you specify a the parent activity in Androidmanifest.xml. intID =Item.getitemid (); if(id = =r.id.action_settings) { return true; } return Super. onoptionsitemselected (item); }}Activity_main.xml Layout fileXmlns:tools= "Http://schemas.android.com/tools"Android:layout_width= "Match_parent"Android:layout_

Data cleansing Note: Generation of the primary key class ID field, note Field Original Works are from the blog of "Deep Blue blog". You are welcome to repost them. You must specify the source when you repost them. Otherwise, you have the right to pursue legal liability for copyright. Deep Blue blog: http://blog.csdn.net/huangyanlong/article/details/46340623 Background] After

Data cleansing Note: correct English date conversion reports "invalid month", note English Original Works are from the blog of "Deep Blue blog". You are welcome to repost them. You must specify the source when you repost them. Otherwise, you have the right to pursue legal liability for copyright. Deep Blue blog: http://blog.csdn.net/huangyanlong/article/details/46340291 Background]

Data cleansing note Original Works are from the blog of "Deep Blue blog". You are welcome to repost them. You must specify the source when you repost them. Otherwise, you have the right to pursue legal liability for copyright. Deep Blue blog: http://blog.csdn.net/huangyanlong/article/details/46340383 Background] When you insert a numeric field to the target end, an error is returned, indicating that the ty

Data cleansing Note: multiple users call the same function Background] During data extraction, when multiple users access different tables on the source end and need to use the same function, they need to create a new one under multiple users. [Solution] When multiple users use the same function, we can choose to recreate the function, but sometimes the exe

Some time ago due to the needs of the work, the need to increase the PPT data export download. found that the network on this aspect of information is not a lot of sporadic to find some relevant information, after their own experiments, and finally complete the relevant functions. Chongboyu request, here to share my experience, the bad place also hope that we have a lot to point out. Before you do, you fir