data scientist vs machine learning engineer

Author Lighthouse Big DataThis document is transferred from the public Lighthouse Big Data (Dtbigdata), reprinted to be authorized If you are interested in a variety of scientific topics in data classes, you are in the right place. This article will introduce you to 42 steps to become a good data scientist. De

Original address: http://blog.csdn.net/lrs1353281004/article/details/79529818 Sorting out the machine learning-algorithm engineers need to master the basic knowledge of machine learning, and attached to the internet I think that write a better blog address for reference. (Continuous update)

First, the machine learning algorithm engineers need to master the skills Machine Learning algorithm engineers need to master skills including (1) Basic data structure and algorithm tree and correlation algorithm graph and correlation algorithm hash table and correlation

03.02 night after the side thought direct GG. Side Links Today 11:30 suddenly received a phone call a face Meng force, a little evasive to the next to two o'clock in the afternoon. Have a safe nap with two cats in the house and wait for the call. I cast the Ant Gold Costume algorithm engineer, may have previously had a finance double degree, was put into the risk management department. The interviewer asked me if I wanted to engage in pure t

problems). Keywords: dealing with problems like people, the collection of technologies Artificial intelligence is a concept that is relatively different from machine learning and data mining, and the purpose of AI is to create an intelligent computer (which can be assumed to be a robot without knowing how to translate it well). In practice, we hope

); insert INTO Employee (Id,name) Span class= "Hljs-keyword" >values (03, ' Rose '); You've noticed that some data needs to be enclosed in single quotes, such as the names of Tom, Jack, and Rose, because their data types are char type. In addition, Varchar,text,date,time,enum and other types of data also require single-quote decoration, while int,float,double

reserved. Most of these digital binaries are used by standard SQL as column names and/or table names (for example, GROUP). A few are retained because MySQL needs them and (currently) uses the YACC parser. Reserved words can be used as identifiers when they are caused.MySQL allows some of the keywords to be used as unrecognized identifiers, because many people have been using them before. Some examples are listed below: ACTION BIT DATE Enum NO TEXT Time TIMES

Today I saw in this article how to choose the model, feel very good, write here alone.More machine learning combat can read this article: http://www.cnblogs.com/charlesblc/p/6159187.htmlIn addition to the difference between machine learning and data mining,Refer to this arti

can be accessed online. You can use the following command to export a "naked warehouse" and then use the SCP command to copy them to your server:$ git clone --bare /home/user/myrepo/.git /tmp/myrepo.git$ scp -r /tmp/myrepo.git myserver.com:/opt/git/myrepo.gitIf other people also have an SSH account on the myserver.com server, TA can clone the (clone) code from this server:clone myserver.com:/opt/git/myrepo.gitThe above command will prompt you to enter the SSH password or use the public key.Viii

feel very strange, perhaps at present you do not have vim to produce any favor, do not think it is a good editor, it can only be because you have not mastered the essence of vim, or you type too slow, go back to the Little Overlord learning machine to practice it-_-| | Here can also be revealed, the essence of vim is the command key combination, the operation of the whole keyboard, you can not leave the ke

new empty database testusing the command: mysql -u root #因为在上一步已经退出了MySQL，现在需要重新登录 CREATE DATABASE test; #新建一个名为test的数据库 Again Ctrl + Z exit MySQL, then enter the statement to restore, the bak.sql just backed up to the test database: test We enter a command to view the table of the Tset database to verify the success of the recovery: mysql -u root #因为在上一步已经退出了MySQL，现在需要重新登录 use test #连接数据库test SHOW TABLES; #查看test数据库的表 You can see 4 tables and a

the table (1) Modify a value in the tableMost of the time we need to make changes not the entire database or the entire table, but one or more of the data in the table, which requires us to use this command to achieve precise modification:UPDATE 表名字 SET 列1=值1,列2=值2 WHERE 条件;For example, we want to change Tom's age to 21,salary to 3000: Note: Be sure to have a where condition, or there will be consequences you don't want to see (2) Delet

Department table), the insert succeeds: 7, non-null constraintsA non-null constraint (NOT NULL), which can be understood by a name, is a non-null constrained column that must not be empty when inserting a value. Violations of non-null constraints in MySQL, will not error, there will only be warnings, such as the following statement: INSERT INTO employee(id,name,salary,phone,in_dpt) VALUES(03,‘Jim‘,3400,119119,‘dpt2‘); #INSERT成功 age为空，因为没有非空约束，表中显示NULL INSERT INTO employee(id,name,age,phone,in_

identifiersIf you want the SHA string name of a binary object (BLOB), you can get it by adding a binary object (BLOB) corresponding to the file path after the ' Tree name ' (treeish).master:/path/to/file10. IntervalFinally, you can use the ".." To refer to the interval between two commits (commit). The following command gives you all commits (commit) between "7b593b5" and "51bea1" except for "7b593b5" (Note: 51BEA1 is the most recent commit).7b593b5..51bea1This includes all commits (commits) th

document in normal mode Enter :h shiftwidth shiftwidth The open Help file in command line mode Input :ver display version and parameters in command line mode Seven, function set 1.vim function settingCan be set when editing the file function settings, such as the command line mode input :set nu (display number of lines), set value exit Vim will not be saved. To permanently save the configuration, you need to modify the Vim configuration file. Vim configuration file ~/.vimrc , you c

statement queries the number of employees in the department, where the ID and name of the employee are from the employee table, people_num from the Department table:The other Connection statement format is using the join on syntax, which is equivalent to the following statement:SELECT id,name,people_numFROM employee JOIN departmentON employee.in_dpt = department.dpt_nameORDER BY id;The result is the same as the statement just now.Second, practice1, using the method of connection query, the numb

editing$ vim protocols Normal mode input /icmp find string ICMP Normal mode Enter to n find the next ICMP Normal mode input ？tcp up lookup string TCP Normal mode input N to find the last occurrence of TCP 3. Advanced Search Enter \* a word in normal mode to find where the cursor is located Normal mode input \# Ibid, but \* forward (up) to find, #则是向后 (bottom) find Normal mode g\* \* , but partially matches the word Normal mode g\# \# , but partiall

character at which the cursor is located. In normal mode, y$ copy to end of line. The character where the light is contained. In normal mode, yw copy a word. In normal mode, y2w copy two words. In normal mode, yG copy to the end of the text. In normal mode, y1G copy to the beginning of the text. Use paste in normal mode p In normal mode, p (lowercase) represents pasting to the cursor (bottom) In normal mode, P (uppercase) means pasting t

For the performance of four different algorithms in different size data, it can be seen that with the increase of data volume, the performance of the algorithm tends to be close. That is, no matter how bad the algorithm, the amount of data is very large, the algorithm can perform well.When the amount of data is large,

of the current node is the middle half of the distance of all its leaf nodes is float (NUMLEAFS)/2.0/plottree.totalw* 1, but since the start Plottree.xoff assignment is not starting from 0, but the left half of the table, so also need to add half the table distance is 1/2/plottree.totalw*1, then add up is (1.0 + float (numleafs))/2.0/ Plottree.totalw*1, so the offset is determined, then the X position becomes Plottree.xoff + (1.0 + float (numleafs))/2.0/PLOTTREE.TOTALW3, for Plottree function p