SAS Retain Statement A Retain statement tells the SAS that it does not set the missing values assigned to the variables during each data step iteration. Instead, it will specify the variable names which sustain and retain the values of all the variables created in the Input or assignment statem...
2. RETAIN的作用:对于数据集中新声明的变量,SAS会在data步循环执行开始时将其置为空值,而如果该变量是retain的变量,则不被置空。 The RETAIN statement prevents SAS from re-initializing the values of new variables at the top of the DATA step.Previous values of retained variables are available for pro...
Without a RETAIN statement, SAS automatically sets variables that are assigned values by an INPUT or assignment statement to missing before each iteration of the DATA step. The RETAIN statement causes the values of all variables that are created with INPUT or assignment statements to be retained fr...
We can see that the value of Var3 in the second observation is assigned the value of 10. This is done using the RETAIN statement. From the above examples, we can clearly see that the SAS RETAIN statement is used to maintain the current value of a variable through multiple iterations of ...
set sashelp.class(keep = _numeric_); *只读入数值型变量; run; drop语句的用法和keep一样,套着用就行,另外drop=选项的效率也高于drop语句。 retain语句《不可执行的语句》retains values from the previous iteration of the DATA step 这个比较重要了,我先解释下sas的运行机制 ...
SAS retain语句组 我在一个小组里遇到麻烦了。假设我有一个数据集: data have_data; input dev nr amount flag $ ; cards; 1 1356 30000 S 2 1356 35000 S 3 1356 40000 L 4 1356 35000 S 1 2345 15000 S 2 2345 20000 S 3 2345 20000 S...
Examples are provided todemonstrate the pitfalls one can experience when constructing a data step. Being cautious can avoid unexpected results. This paper uses a PUT _ALL_ statement to demonstrate how automatic retain variables can be retained.Huei-Ling Chen...
“The biggest challenge facing higher education right now is just trying to wrangle all the information in a way that can actually be used for some really strong purposes,” Simon says. Since implementing SAS, efficiencies afforded by analytics have reduced costs at the university by more than ...
View solution in original post 1 Like 11 REPLIES Reeza Super User Re: Assign and Retain Values to Dynamic Variable inside a macro Posted 01-03-2017 09:25 PM (4975 views) | In reply to Mila Do you have SAS ETS? You can check by running the following: proc setini...
(2)TheKEEPstatement specifies variables that are to be included in anydata setthat is being created. 5. 如果 retain语句 后面不跟任何变量,则: 会将所有由input和 赋值语句“=”创建的变量 都会retain其值,在data步的迭代中。 6. 默认情况下,如果不使用 RETAIN 语句, SAS会自动将由 input 和 赋值语句...