2. When you reference a macro variable in a SAS program, SASreplaces the reference with the text valuethat has been assigned to that macro variable. By substituting text into programs, SAS macro variables make your pr...
Macro variable value 长度不超过64000 characters. Local & Global : Local macro variable is defined insides the macro, which can be used only in the macro. Global macro is defined outsides the macro, which can be used exerywhere in the program. Local macro variable 可以被转换成 Global macro...
A macro variable does not belong to a data set, and its value is always character. This value could be a variable name, a numeral, or any text that you want substituted into your program. (宏变量不属于数据集而变量都是属于数据集) 2.按定义方式可分为两类: 1).Automatic Macro Variables:...
%put &Sqlobs Names added to Macro variable (array) %nrstr(&NAMES) ; 这里第二行的names宏变量就是包含了SASHelp.class表中的全部name的值,并且以" "分隔开。 为了演示SCAN与%SCAN的区别,我们看一看下面两个例子: data _null_; test="AA...
3) 因为%STR的作用发生在编译期间,所以它往往用来屏蔽一个常字符串(constant string)。类似于%str(&a)的写法其实没有太大的意义: %macro test(val); %let a= %str(&val); data _null_; set sashelp.vmacro; if name = 'A' then put value $hex10.; run; %mend test; %test(a+b); === ...
宏处理器(macro processor)会进行如下工作 examines these tokens requests additional tokens as necessary performs the action indicated. 对于宏变量,宏处理器会做以下几件事 creates a macro variable in the symbol table and assigns a value to the variable ...
2. When you reference a macro variable in a SAS program, SAS replaces the reference with the text value that has been assigned to that macro variable. By substituting text into programs, SAS macro variables make your programs more reusable and dynamic 3. 判断宏变量定义的结束是以分号为分...
It is a matter of timing, a macro term used for when the macro compiler resolves the macro var. You could use the '&&' in front of your macro var. This will resolve to the macro var at compile time. At run-time the value you want would be inserted. Of course this is too complic...
这里定义一段宏程序:获取排序的metadata,并生成一个全局宏变量,命名为**SORTSTRING, 其中 两个星号代表的是具体的domain,比如DM,LB。 这个排列顺序也可能用来在SDTM数据集中定义 --SEQ变量。 /*make_sort_order.sas*/%macromake_sort_order(metadatafile=,dataset=);/*从Excel文件SDTM_METADATA中导入“VARIABLE_...
/* macro make_empty_dataset.sas */%macromake_empty_dataset(metadatafile=,dataset=);procimportdatafile="&metadatafile"out=_temp dbms=excelcs;sheet="VARIABLE_METADATA";run;proc sort data=_temp;where domain="&dataset";/*如,只选取DM */by varnum;run;%global&dataset.KEEPSTRING;data _null_;set...