if the (drop=variable) statement is used in the data statement with 3 data sets, but i say to drop the same variable in all 3, can it still be used in calculations? 0 Likes Reply 3 REPLIES Cynthia_sas SAS Supe
If so, which oneis preferred?* How a DATA step statement works? How set option facilitates the data step? How to use ABORT and STOPstatement in data step.* What's the best way to subset data - IF and/or Where statement? Demoed by use of some PROC statements.* Is it possible to ...
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Using the Import Wizard is an easy way to import data into SAS. The Import Wizard can be found on the drop down file menu. Although the Import Wizard is easy it can be time consuming if used repeatedly. The very last screen of the Import Wizard gives you the option to save the state...
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data aaa; infileabctruncover; input var $3000.; run; When it encounters a DATA, PROC, or RUN statement, SAS stops reading statements and executes the previous step in the program. This program contains one DATA step and two PROC steps, for a total of three program steps. ...
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的data步和run语句之间其实是一个循环,比如当使用set语句的时候,每次set一条观测,一直运行到run;...
BY Statement BY 语句用于规定分组变量,和set, merge, update或modify语句搭配使用。可以用于 DATA step 或 PROC step 中。参考链接:Statements: BY Statement - 9.2 (sas.com) How SAS Identifies the Beginning and End of a BY Group SAS identifies the beginning and end of a BY group by creating two...
PROC IMPORT DATAFILE=filename OUT=data-set DBMS=identifier REPLACE;在默认情况下,IMPORT程序步将第一行数据作 20、为变量的名称。若第一行数据并非变量名,可在IMPORT语句后使用GETNAMES=NO语句。若IMPORT程序读入的是分隔符文件,默认分隔符为空格。若不是,则需使用DILIMITER=statement语句指定分隔符。PROC IMPORT...
SAS数据清理与分析技术指南说明书