将数据集SASHELP.workers第10到15条观测中满足条件"ELECTRIC>260"的观测提取出来,生成新的数据集tmp。 代码1: data tmp; 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.w...
在SAS中,可以使用IF语句来设置等于0或1的变量。IF语句是一种条件语句,根据条件的真假来执行不同的操作。 在SAS中,IF语句的基本语法如下: ``` IF condition THEN do;...
1.1:The WHERE statement examines what is in the input page buffer and selects observations before they are loaded in the program data vector, which results in a savings in CPU operations(Where从buffer中进行筛选再读入pdv) The subsetting IF statement loads all observations sequentially into the pro...
sas条件判断语句where,if的区别，以及where选项 1：where和If最本质的区别，以及⼀些⼩的区别 1.1：The WHERE statement examines what is in the input page buffer and selects observations before they are loaded in the program data vector, which results in a savings in CPU operations(Where从buffer...
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;...
Mike K Smith
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...
如果我们查看第14.7节,我们会发现语句中可能有标签前缀,例如: LabeledStatement:标识符:语句 理论上,标签应该能够标记任何后续语句。因此,例如,以下内容相应地编译: public class Test { public static void main(String[] args) { hello: return; } } 从直觉上看,这还汇编了: public class Test { int i; ...
in the Americas; run; 行: IF WHERE 数据 SASHELP.workers 10 到 15 条中满足条件 ELECTRIC260 的,新的数据tmp 1: data tmp; set SASHEL .workers (firstobs=10 obs=15); if ELECTRIC 260; run; proc print data = tmp; title IF Statement; run; 行(4 条): 2: data tmp; set SASHEL ....
source authentication source code statement source control system source debugger source entry source extrapolation source follower source for the produc source gain limited source hashing schedu source hotel of the h source journaling source new products source of life source of pollution i source of so...