1.FORMAT生成formats(又叫 值标签) 2.LABEL生成变量的标签 3.rename在data步中给变量改名 4.if then只有在condition是true的时候执行一个 statement . 5.functions使用SAS functions 生成新变量. Function作用: 接受变量,执行计算和其他操作。返回一个value。 返回值value可以是numeric 和 character。 返回的值 可以...
In the second section of code, vertical spacing separates the one DATA step and two PROC steps. 在代码的第二部分中,垂直间隔分离了一个DATA步骤和两个PROC步骤。Horizontal spacing clearly shows clearly the beginning and ending of the DATA step and ...
In a DATA step, if the SUBSTR (right of =) function returns a value to a variable that has not previously been assigned a length, then that variable is given the length of the first argument. The SUBSTR function returns a portion of an expression tha...
Data Step with Modifiy Statement Posted 04-08-2022 08:52 AM (1107 views) Hello. This Knowledge Base entry shows examples for using the "modify" statement: https://support.sas.com/kb/24/678.html Regarding example 1, how do I have to change the SAS code in order to get this resul...
When usedate=no SAS will read date and time formatted data with a datetime format. Keep 70、 the default statement scantime=yes to read in time formatted data as long as the variable does not also contain a date format. Example 1: Making a permanent data fileWhat if you want the SAS ...
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。
In this paper I will focus on the RETAINstatement, but with an eye toward certain general properties of the SAS DATA step. Looking at the DATA step from the perspective of a particular statement allows for an immediate, and concrete, grasp of what otherwise might feel like a rather abstract...
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将数据文件读入SAS ——DATA Step / PROC IMPORT 1.将SAS文件读入SAS—— data sasuser.saslin; set "F:\sas1.sas7bdat"; run; proc contents data=sasuser.saslin; run; 2.将其它形式文件导入成SAS ——PROC IMPORT / 直接读入其它形式文件
当中,Proc Format Statement标志Proc Format过程,options选项包含sas dataset与sas format的转换、是否永久存储等指令。 Exclude Statement与Select Statement功能相近,都是对FMTLIB和CNTLOUT=这两个options加工处理。区别在于:Exclude entry(s)起排除作用,Select entry(s)起选择作用。 Invalue与Value Statement功能相近,区别...