(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 in the DATA step, and only one BY statement ca...
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...
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...
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_; ...
PROC IMPORT DATAFILE=filename OUT=data-set DBMS=identifier REPLACE;在默认情况下,IMPORT程序步将第一行数据作 20、为变量的名称。若第一行数据并非变量名,可在IMPORT语句后使用GETNAMES=NO语句。若IMPORT程序读入的是分隔符文件,默认分隔符为空格。若不是,则需使用DILIMITER=statement语句指定分隔符。PROC IMPORT...
问SAS:数据步骤视图->错误:按变量排序不正确EN我正在使用一个宏来根据名称遍历文件并提取数据，这在大...
NOTE: The data set SASLIB.INVENTORY has 4 observations and 3 variables. NOTE: DATA statement used (Total process time): real time 0.02 seconds user cpu time 0.00 seconds system cpu time 0.00 seconds memory 602.50k OS Memory 26020.00k Timestamp 07/20/2017 09:19:42 AM Step Count 27 ...
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。
Use advanced DATA step programming statements to solve complex problems. Write and interpret SAS SQL code. Create and use SAS macros. Learn what to expect on the exam in this short, must-watch video. Find out why you should get certified. ...