(简译:BY 通过自动生成临时变量 FIRST.variable 和 LAST.variable 来识别数据集按照 BY group 中的变量分组后,每组的首行和末行) Use BY In a DATA Step The BY statement applies only to the SET, MERGE, MODIFY, or UPDATE statement that precedes it
除了可执行(Executable)和声明性(Declarative)语句,SAS DATA step语句还可根据其具体功能进行分类: 基本DATA步程序样式如: 程序以DATA语句开头,为SAS数据集,视图或程序提供名字。 DATA <data-set-name-1 <(data-set-options-1)>> <... data-se...
SAS数据步 DATA STEP: A SASDATA stepisa group of SAS language elementsthat begins with aDATA statement and ends with aRUNstatement. The DATA statement isfollowed byother programming language elements such as moreDATA step statements,functions, data set options, formats, and informats. These language...
IF-statement processing in DATA step Posted 05-14-2024 12:45 PM (2311 views) **ADDENDUM to original post: I realized that this issue was being caused by starting with a "RETAIN" statement, which I use to put the variables in the desired order. But I'd still like to leave this ...
SAS dataset 有很多针对数据集的选项(option),这些选项都有同名的 statement. 常见的有: options 和 statement 的功能和使用方法几乎一致,区别在于:statement 只能在 DATA step 中使用;options 在 DATA / PROC step 中都可以使用,既可以用于 read-in data 也可以用于 write-in data, 写法统一是DATA=dataset (opti...
Beyond the obvious benefits of staying one step ahead of regulatory mandates, having accurate, integrated and transparent data drives confident, proactive decisions and supports a solid risk management foundation. 分析报告 SAS is a Leader in The Forrester Wave™: Enterprise Fraud Management, Q2 2024...
data _null_;/*当不想产生数据集时在data后使用_null_关键字*/ a='321 abc'; b=anyalnum(a,4);/* or b=anyalnum(a,3) 结果:b=3*/ put b=; run; 结果:b=5 eg2: Anyalnum函数的应用 Scanning a String from Left to Right; data _null_; ...
问SAS:数据步骤视图->错误:按变量排序不正确EN前几天看到一个群友提的一个问题，根据数据集中的某一...
Null Data Sets If you want to execute a DATA step but do not want to create a SAS data set, specify keyword _NULL_ as data set name; data _NULL_ ; Automatic Naming: If you do not specify a SAS data set name or using _NULL_ in DATA statement, SAS automatically creates a data se...
Retain Statement: 1. 作用: Causes a variable that is created by an INPUT or assignment statement to retain its value from one iteration of the DATA step to the next. 2. 作用范围: (1) 使用INPUT创建的变量, (2)使用赋值语句 “=” 创建的变量。