有效使用范围:DATA Step 。参考:Statements: RETAIN Statement - 9.2 (sas.com) Without a RETAIN statement, SAS automatically sets variables that are assigned values by an INPUT or assignment statement to missing before e
SET reads all variables and all observations from the input data sets unless you tell SAS to do otherwise. A SET statement can contain multiple data sets; a DATA step can contain multiple SET statements. 2. RETAIN的作用:对于数据集中新声明的变量,SAS会在data步循环执行开始时将其置为空值,而如...
What does this Retain statement do in this Data Step? Posted 04-09-2016 12:20 AM (2306 views) data total_points (drop=TeamName); length Event3 Event2 Event1 8. TeamName ParticipantName $8. ; format Event2 z8. ; retain TeamName Count ; input TeamName $ Count @ ; do ...
If a value appears in a RETAIN statement, variablesthat appear before it in the list are initially set to that value. If different initial values areassigned to the same variable by naming it more than once in a RETAIN statement, SAS uses the last value.Yi Zhao...
SAS Retain Statement A Retain statement tells the SAS that it does not set the missing values assigned to the variables during each data step iteration. Instead, it will specify the variable names which sustain and retain the values of all the variables created in the Input or assignment statem...
sasretain用法sasretain用法 The basic syntax of RETAIN statement is as follows: RETAIN <variable 1> <variable 2>…<variable n>; Where, <variable 1><variable 2>…<variable n> are the variables whose values have to be maintained through out the iteration of the Data Step. When the RETAIN ...
Extracting entity characteristics from multiple data records requires consolidating and/or comparing data elements across records. The SAS RETAIN statement enables such actions.By default data elements created in a data step are set to missing at the beginning of each DATA step iteration. The ...
retain语句《不可执行的语句》retains values from the previous iteration of the DATA step 这个比较重要了,我先解释下sas的运行机制 sas的data步和run语句之间其实是一个循环,比如当使用set语句的时候,每次set一条观测,一直运行到run;再返回程序开头,继续set第二条观测值,一直将数据集的观测值读取完。
“The data management opportunities that SAS afforded us have been a real difference maker,” Simon says. “It was the shot of adrenaline we needed to reach our goals.” Armed with a single source of the truth, executives quickly gained the confidence to make policy decisions based on analyti...
Effective Use of RETAIN Statement in SAS® Programming 热度: Hotel Company to retain key employees Countermeasures_14897 热度: Copyright©2007Asuragen,Inc NATTestinginSolidTissues andOrgans:APre-analytical SolutionforNucleicAcid Stabilization CindyWalkerPeach,Ph.D. ...