RENAME语句可以在DATA步骤中直接更改变量名。语法如下: sas data new_dataset_name; set old_dataset_name; rename old_variable_name=new_variable_name; run; 示例: 假设我们有一个数据集mydata,其中有一个变量名为old_var,我们想要将其重命名为new_var: sas data mydata_renamed; set mydata; rename old...
This paper discusses a number of ways to rename variables. Its topics include the RENAME statement used in DATA steps, the RENAME= data set option, the AS keyword for PROC SQL, using macros, and using the DATA _NULL_ step.A “quick and dirty” way to change the name of a variable is...
“DROP=”、“KEEP=”和“RENAME=”选项与DROP、KEEP和RENAME语句的差异: 这些语句应用于DATA语句指定的全部数据集,而这些选项只应用于所跟随的特定数据集。 此外,这些语句比这些选项更有局限,因为它们只能在DATA步使用,且只应用于要创建的数据集。而这些选项可以在DATA步或PROC步使用,且可应用于输入或输出数据集。
你可以使用GUI文件管理器或命令行终端重命名文件。 在本教程中，我们将向你展示如何使用mv和rename命令重...
UPDATE master-data-set transaction-data-set; BY variable-list; 只能指定两个数据集,一个是主数据集一个是交易数据,都需要按照匹配变量排序。且BY变量必须具有唯一性。 例子一家医院有一份关于病人的主数据。变量依次为病人账户号码、名字、地址、出生日期、性别、保险代码、信息最后被更新的时间。
sas data original_data;input original_variable $; -- 原始字符型变量 rename original_variable = new_number;run;data converted_data;set original_data;new_number = input(new_number, best12.); -- 将字符型转换为数值型 drop original_variable;run;这里的`best12.`是一个format，它...
variable + expression; The variable must be numeric and has the initial value of zero. This statement adds the value of the expression to the variable while retaining the variable’s value from one iteration of the DATA step to the next。
data _dt4comb; set _bygrp _sum; run; %end; %else %do; %put WARNING: 不计算合计列; data _dt4comb; set _bygrp; run; %end; 统计量的构造 根据目标表格中的样式: * _3.2 Variable construction of the target format; data _combdt; ...
This paper illustrates step by step how to rename and modify attributes of variables using SAS(R) 9.1. The main objectives are: 1) renaming variables; 2) modifying the attribute of variables (i.e. length, format and label); 3) assuming attribute of a variable in specific dataset and ...
1:基于前面的描述增加 SAS creates the FIRST.variable and LAST.variable for each variable listed in the BY statement 2:清空变量的方式有不同,The values of the variables in the program data vector are set to missing each time SAS starts to read a new data set and when the BY group changes...