sas purses

Theory and formula please see Andrew Ng's machine learning in the NetEase public class, or the machine learning of Andrew Ng in CourseraFor multivariate linear regression to fit the best straight line, in order to make the error squared and the smallest, the method on the textbook is to seek the bias, and make it 0, and then solve the linear equation group.But there are many other ways to achieve this, and Andrew gives two methods of gradient descent in the case of large samples and small sample

1 Data _ NULL; /* _ Null _ makes it unnecessary for the system to generate a new dataset to save memory. */ 2 Infile ' C: \ myrawdata \ candy. dat ' ; 3 Input name $ 1 - 11 Class @ 15 Datereturned mmddyy10. candytype $ quantity; 4 Profit = Quantity * 1.25 ; 5 6 /* Focus: output reports using file and put */ 7 File ' C: \ myrawdata \ student.txt ' Print;/* The file statement specifies the output path of the reprot. The print option tells

How to open a log in SAS eg to preserve detailed operation information. To turn on the Enterprise Guide log feature, copy the C:/Program files/sas/enterprise guide 4/logging.config file to C:/Documents and Settings/ So the next time you open the eg, the operation will be recorded in the log file if you want to deactivate, delete the file directly can C:/Documents and Settings/ The log file contains the

Like old SCSI and SATA technologies, SAS supports hot-swappable disks, which is important for environments that maintain high availability requirements. And SAS is a complete two-way system, while SATA inherits the IDE's characteristics and is a system of half-two-way communication. Therefore, the SAS system throughput can be similar to the SATA system twice time

http://blog.csdn.net/killmice/article/details/42745937 The test tool FIO is read sequentially as an example, with the following commands: fio-name IOPS-RW = Read-bs = 4k-runtime = 60-iodepth 32-filename/dev/sda6-ioengin E Libaio-direct = 1 where rw = read for random reads, BS = 4k for each read 4k, filename specifies the corresponding partition, here I am/dev/sda6, direct = 1 means the cache through Linux Test SATA Hard Drive, SAS hard drive, SSD har

1: Due to work, I have been engaged in the development of 2 * 36port Expander in LSI for the past few months. It mainly parses and processes the SSP, SMP, and SES command protocols in SAS. The SDK of LSI uses the threadx operating system. The kernel of its chip is ARM920T, which provides the SAS protocol processing function at 920t. I personally feel that the Code style is not good. My personal understandin

0 reply content: All users who have used the content will answer the question: The requirement of spss for users is that they only need to click the menu. There is a programming window, but it is generally not used. Most users have received some statistical training, but they do not need advanced analysis capabilities, market research is widely used, and the major of statistics is generally required Many of the well-written procedure in sas are Fda-c

Php Chinese network (www.php.cn) provides the most comprehensive basic tutorial on programming technology, introducing HTML, CSS, Javascript, Python, Java, Ruby, C, PHP, basic knowledge of MySQL and other programming languages. At the same time, this site also provides a large number of online instances, through which you can better learn programming... Reply content: all the users who have used it will answer: The requirement of spss for users is that they only need to click the menu. there is

Many people mention the SAS disk and SATA disk, the first thought is the difference between the interface, the SAS interface speed is much higher than SATA, so that the SAS disk than SATA disk faster, high performance. In fact, the interface is not the difference between the main, but only a small aspect. So where is the biggest difference between

OverviewA unit server in Beijing accidentally offline, hot spare disk, replace the offline hard disk. However, the hot spare disk in the process, another hard drive offline, causing hot spare synchronization failed, two sets of RAID array crashes, LVM structure is incomplete, the file system is not working properly, the server data needs to be repaired. Two off-line hard drive detection, found that the first offline hard drive is not recognized, the initial inference is a hardware failure, the n

substr (s,p,n) with the character position commandfunction: The substitution and extraction of SAS characters.Grammar:1. Extract: New=substr (old,p,n)Start extracting n-length characters from the first character of the variable old, and name it the variable new.such as: New=substr (old,2,3); old= "ABCDEFG"; new= "BCD";2. Replacement: substr (old,p,n) = "XXX"The first character of the variable old is replaced by n characters, and the replacement conten

Since the last time I wroteArticleIt was already a few months ago. Here I will post the article address. If you are interested, you can check it out. 1) database entity design that supports differential data storage-debut 2) database entity design that supports differential data storage (2) (continued) 3) database entity design that supports differential data storage (3) (continued) 4) Introduction of the SAS framework (this article)

1 Proc Sort data = Data - Set 2 Out = Neat 3 Nodupkey 4 Dupout = Extraobs; 5 By Variable - 1 Variable - 2 ... Variable - N; 6 Run; Note: If out = is not specified, the sorted data is automatically replaced by the original dataset. the nodupkey option command SAS deletes repeated observations of variables in the by statement. dupout = option command SAS puts the de

The usual array functions in SAS are: Dim dimk hbound Hboundk LBound lboundkThe array function counts the dimensions, the upper and lower bounds of the array, and facilitates the writing of the portable program, which includes:Dim (x) To find the number of elements in the first dimension of the array xDIMK (x) to find the number of elements in the array x K dimensionLBound (x) to find the lower bound of the first dimension of array XHbound (x) to find

SAS and SATA Hard Drive guidelines When you add a hard disk drive to the server, follow these general rules: The system will automatically set all drive numbers If you are using only one hard drive, install the drive in the home with the smallest drive letter. When multiple drives are divided into the same drive array, these drives must have the same capacity to maximize storage space efficiency. Drives in the same logical volume must have the sa

Data input and output in SAS are: 1. By column: Input variable name Data score; /* Create a data set on the score */Input name $1-10 Math 11-12 Chinese 17-18 中文版 26-27; /* For each variable, enter data by column */Datalines; /* Tip Below is the data line */Bital 90 92 88Martin 80 95 94Run2. List input: Input variable name Data /* Data set name default, default is data1*/Length City $9/* Specifies that the length of the character variable is 9 (the def

(%) any sequence of zero or more charactersproc SQL; Select Ffid, name, address from sasuser.frequentflyers where like ' % P%place ' * Spaces are also included in the string; Quit;3.6:using the sounds-like (=*) Operator to Select a spelling variationThe Sounds-like (=*) operator uses the SOUNDEX algorithm to compare each value of a column (or other Sql-expressi ON) with the word or words (or other sql-expression) so you specify.3.7:subsetting Rows by Using calcu

Tags: SAS XFS SSDAn OLTP performance comparison test was previously done: SAS vs SSD various modes MySQL TPCC OLTP comparison test results, this time to do the OLAP comparison test.The comparison test results are shown below:650) this.width=650; "Src=" http://dp.imysql.com:8080/files/upload_yejr_imysql/SAS_VS_SSD_MySQL_OLAP_benchmarking _20121225.jpg "style=" border:0px; "alt=" sas_vs_ssd_mysql_olap_benchma

Systask Executes, lists, or terminates asynchronous tasks Valid in: Anywhere in a SAS Program Windows specifics: All Syntax Ask command"Host-command"Taskname>Name-VaR>Stat-VaR>Shell-command">>; Shortask list Taskname> Systask killTasknameTaskname...>; Command Executes Host-command List Lists either a specific ac

Data student1;Input name$ age score;Datalines;Wangwu 29 68Lisi 30 85Wangxi 28 79Lixingxun 32 91Wufang 27 56;RunData student;Set student1;RunData student2;Input name$ age score;Datalines;WANGWU 29 88Lisi 30 89Wangxi 28 85Lixingxun 32 93Wufang 27 76;Run/* Display the original data set */Proc Print data=student;Title "Original data Set";Run/*remove Removal Observation */Data student1;Modify Student1;If score RunProc Print data=student1;Title "Remove";Run/*replace Replacement Observations */Data stu