set SASHELP.workers(firstobs=10 obs=15); if ELECTRIC > 260; run; proc print data = tmp; title 'IF Statement'; run; 运行结果(4条记录): 代码2: data tmp; set SASHELP.workers(firstobs=10 obs=15); where ELECTRIC > 260; run; proc print data = tmp; title 'WHERE Statement'; run; ...
The subsetting IF statement loads all observations sequentially into the program data vector. If the statement finds a match and the statement is true, then the data is processed and is written to the output page buffer(If先读入pdv再进行筛选) 1.2:if可以从input的数据和sas数据集的数据中进行筛选...
This can also be done using the IF-THEN DELETE statement. 2. IF-THEN DELETE IF Data readin; Input ID Q1-Q3; cards; 85 1 2 3 90 3 4 6 95 5 5 6 100 6 6 4 105 5 5 6 110 6 6 5 ; Data readin1; Set readin; IF ID GT 100 THEN DELETE; run; ...
setSASHELP.workers(firstobs=10obs=15); whereELECTRIC>260; run; procprintdata= tmp; title'WHEREStatement'; run; 运行结果(6条记录): 上述两种方法为什么输出结果不一样?请注意IF语句和WHERE语句的区别: (1)IF语句是面向“程序数据向量”(ProgramDataVector)的,对当前PDV中的数据进行判断,满足条件时将其写入...
HTML5学堂：在JS的循环语句当中，for、for-in的确是使用管比较频繁的，但是额外还有两种循环语句，一种...
在DATA STEP 使用:构造子集 IF 语句.(subsetting IF statement) 语法: IF expression; 例: IF Sex = ' f ' ; IF expression; 这样的看起来有点怪,但是正确的. 表明:当expression 是TRUE时, SAS继续执行 DATA step。 如果expression 是 FALSE, 对当前observation不继续执行下面的语句,且,该observation不加入...
Could anyone please explain how SAS processes the following code : Raw data file (Text file) data : Ruth 39 11 (39 starts at Col7 and 11 at Col10) Jose 32 22 Sue 30 33 John 40 44 DATA STEP :- data new_1;infile 'test1.txt';INPUT EMPLOYEE_NAME $ 1-4;If employee_name='Ruth...
When programming in SAS, there is almost always more than one way to accomplish a task. Beginning programmers maythink that there is no difference between using the WHERE statement and the IF statement to subset your data set.Knowledgeable programmers know that depending on the situation, ...
There are two types of conditional statements in the SAS language: the IF-THEN statement and the subsetting IF statement. The IF-THEN statement is described in this chapter; the subsetting IF statement is described in Chapter 10. Both ty... PA Herzberg - Springer US 被引量: 0发表: 1990...
select 里包含 if statement if语句和where语句是SAS中最常用的逻辑判断语句,主要用于数据筛选和条件赋值。当进行多分支的条件判断时,可以使用if...else语句来实现。如下: if .<AGE<18 then AGEGR1N=1; else if 18<=AGE<=40 then AGEGR1N=2; else if 41<=AGE<=64 then AGEGR1N=3;...