数据索引的创建有三种方式:data步骤、sql步骤、datasets步骤。其中还是有点困惑在data与datasets的区别之上,datasets是对逻辑库中数据集进行操作的方式,而data之后是代表程序的开始。 1、data方式创建索引 代码语言:javascript 代码运行次数:0 运行 AI代码解释
如: MERGE ONE(IN=A) TWO; 即当前观测取自ONE时, 则A=1,这一信息可用于DATA步中间的程序语句(如: IF A=1 THEN …), 但此变量不进入正被创建的SAS数据集中; ④KEEP=变量名列表 等号后面的所有变量将保留在数据集中; ⑤LABEL='单引号内写标签内容, 字符数应≤40'...
SAS数据集 SAS数据集(SAS Datasets)可以看作由若干行和若干列组成的表格,类似于一个矩阵,但各列可以取不同的类型值,比如整数值、浮点值、时间值、字符串、货币值等等。...数据集的每一行叫做一个观测(Observation),每列叫做一个变量(Variable)。SAS数据集等价于关系数据库系统中的一个表。 2...有三个预定义...
Permanent, up to 50% faster with PROC SORT if merging datasets, up to 100% slower without PROC SORT, may prevent other procedures such as PROC APPEND Hash Tables Direct access by key variable value, reference datasets within DATA steps as a multiple dimensional array but with both numeric ...
AS 400数据库与PC-DOS SAS软件的链接说明书
11.DATASETS对一个SAS库进行列表、拷贝、更名、子和删除SAS文件(数据集和目录)。12. DBF使SAS数据集与dBASEⅡ、dBASEⅢ文件互相转换。13. DIF使SAS数据集与数据交换格式(DIF)文件互相转换。14. DOWNLOAD实现微机与主机间的连接,并使信息从主机向微机传递。
5. Elucidate the APPEND procedure. The term ‘append’ means adding at the end. In SAS, we can say that the APPEND procedure is a procedure adding one SAS data set to another SAS data set. 6. Describe PROC UNIVARIATE. PROC UNIVARIATE is used for the elementary numeric analysis, and it...
60. Two ways to reverse order of data Reverse order of data 61. Which is more faster- Data Step / Proc SQL The SQL procedure performed better with the smaller datasets (less than approx. 100 MB) whereas the data step performed better with the larger ones (more than approx. 100 MB). ...
If you reverse the two datasets then you will need the FORCE option, but the extra variables will NOT be added to the base dataset. proc append base=two data=one force ; run; NOTE: Appending WORK.ONE to WORK.TWO. WARNING: Variable in3 was not found on BASE file. The variable will ...
Proc Append (with Examples) Proc Report Explained Proc Tabulate Explained Use of Multiple Set Statements Joining and Merging in SAS SAS Many to Many Merge Combining and Appending Datasets Retain Statement Calculating Percentiles with SAS Calculating Quartiles with SAS ...