(三)数据步中使用IF-THEN语句创建子数据集(也见系列03) 数据步读入数据时,用IF-THEN语句选择满足条件的数据读入。 语法: if 条件; 如果“条件”为真,则数据步将继续执行。还可以使用DELETE语句,来删除哪些不要的数据: 下面这两句话是等价的: if Sex='f'; if Sex='m' then DELETE; 例2莎士比亚歌剧的清单...
8、YYQ函数从年和季度年的值中返回SAS日期值,日期为指定季度的1号。 The YYQ function returns a SAS date value that corresponds to the first day of the specified quarter. If eitheryearorquarteris missing, or if the quarter value is not valid, the result is missing. Syntax : YYQ(year,quarter...
When you want to read the entire file, you can remove the obs= option entirely.A typical infile statement for reading a comma delimited file that contains the variable names in the first line of data would be:INFILE "test.txt" 47、 DLM=',' DSD MISSOVER FIRSTOBS=2 ; 读入有缺失值的...
BYprocesses data and orders output according to the values of a classification (BY) variable.The BY statement in SAS/GRAPH is essentially the same as the BY statement in Base SAS, but the effect on the output is different when it is used with SAS/GRAPH procedures.When used with SAS/GRAPH...
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中进行筛选再读入pdv) ...
Use BY In a PROC Step 一些SAS procedures 中也可以使用 BY 语句,such as PROC SORT. Example This example creates a new data set, CLASS.BESTSCORES, which contains one observation for each ID value. procsort data=class.allscores;byid;
firstnamecontains'Jon'; in 属于 actlevel in ('LOW','MOD'); fee in (124.80,178.20); and 且 age<=55 and pulse>75; or 或 area='A' or region='S'; 二、数据步中使用IF-THEN语句赋值 数据步中经常需要有选择地赋值新变量或修改原数值。
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...
Using %IF-%THEN-%ELSE in SAS Programs Doing More with SAS Studio Working with Queries Understanding Process Flows Setting Your Preferences Writing Your First Custom Task Accessing Data Accessing Data in SAS Libraries (Video) How Do I Access Data in SAS?
A shared access signature is a token that is appended to the URI for an Azure Storage resource. The token that contains a special set of query parameters that indicate how the resources may be accessed by the client. One of the query parameters, the signature, is constructed from the SAS ...