默认情况下是数组名+序号,但是也可以自己设定(注意是变量的名字,设定好后可以参与运算的那种),还可以有一下四种形式 _ALL_specifies all variables,If you use _ALL_, all the previously defined variables must be of the same type _NUMERIC_specifies all numeric variables. _CHARACTER_specifies all character...
VARanalysis-variable-list; The VAR statement specifies which numeric variables to use in the analysis. If it is absent, then SAS uses all numeric variables. CLASSclassification-variable-list; The CLASS statement tells SAS which variables contain categorical data to be used for dividing observations ...
参数:k: 指定一个整数常数,或一个表达式.值为1~n之间的值。包含,指定每个组合的元素的数量。参数:variable: specifies either all numeric variables, or all character variables that have the same length. The values of these variables are permuted....
SAS stores the value of all numeric variables in floating-point representation. This paper begins with a brief, practical, overview of floating-point representation and how it relates to programming questions regarding length, precision, and efficient use of disk space. We will discuss situations ...
_numeric_ :所有数值变量; _character_:所有字符变量; _all_:所有变量; fisrt.variable:同一by组第一个观测; last.variable:同一by组最后一个观测; _iorc_:若数据集没有观测,则iorc=1,否则iorc=0,当使用modify语句并搭配by语句和key=选项时,会被创建; ...
SAS数据清理与分析技术指南说明书
SAS has three types of variables as below −Numeric VariablesThis is the default variable type. These variables are used in mathematical expressions.SyntaxINPUT VAR1 VAR2 VAR3; #Define numeric variables in the data set. In the above syntax, the INPUT statement shows the declaration of numeric...
PROC PRINT displays columns in the following order: a column for observation numbers, all character variables, and all numeric variables. PROC PRINT displays all observations and variables in the data set, a column for observation numbers on the far left, and variables in the order in which the...
b. PROC PRINT displays all observations and variables in the data set. If you want an additional column for observation numbers, you can request it. c. PROC PRINT displays columns in the following order: a column for observation numbers, all character variables, and all numeric variables. d....
_numeric_数值变量_character_字符变量_all_所有变量 二、 计算生日函数mdy(m,d,y) Informat输入格式 Format输出格式 在默认情况下,SAS系统以0代表1960年1月1日0时。 其它日期在SAS系统中被存储为与该日期相差的天数。 变量类型转换: 字符自动转换为数值 数值自动转换为字符 ...