SAS执行过程中,在DATA步迭代之初都会把PDV(Program Data Vector)中非保留和非输入变量设为缺失值。SAS从输入文件或一个SAS数据集读入数据到PDV(Program Data Vector)中,同时会替掉以前存在的值。 DATA步处理过程:系统介绍 Example 4 – simple default – no reading of input data /*简单默认-没有读入input数据*...
SAS执行过程中,在DATA步迭代之初都会把PDV(Program Data Vector)中非保留和非输入变量设为缺失值。SAS从输入文件或一个SAS数据集读入数据到PDV(Program Data Vector)中,同时会替掉以前存在的值。 from http://saslist.net DATA步处理过程:系统介绍 Example 4 – simple default – no reading of input data /*...
F7: dsd step 1; dsd list I; dsd ex _all_ /*Assign commands function key F7*/ * data temp1/debug; input a b $ c; cards; 1 A 100 2 B 200 3 C 300 4 D 400 ; run; Debug of Data Step * * Example 1 - Code The following simple DATA step produces a SAS data set from the...
SAS 内置 debug 工具,可以用于 debug DATA step. 通过在 DATA 步中加上相应的 debug 命令,并运行DATA步,就可以调出 Debugger 查看每一行代码的运行结果。 参考DATA Step Debugger: Examples - 9.2 (sas.com) Usage and Example 首先在 data step 中添加 /debug 命令: /*This is the raw code*/data ds2 ;...
3. Type the below code as an example using the do loop. 4. data First; 5. do inp = 1 to 10; 6. res = inp**2; 7. output; 8. end; 9. run; 10. When executing the above code, we get the below sample output. SAS DO Loop Iterative with Examples ...
Example: 11、REPEAT(X,n) 重复字符表达式 12、LFET(X) 将SAS字符串左对齐 13、RIGHT(X) 将SAS字符串右对齐 SAS之COMPBL、DEQUOTE函数(20110114) COMPBL 去除字符串中多余的空格,也就是将连续的多个空格转化为1个空格。 如: data test; string='ab cxy z pq ' ...
42、r where the data actually begin. For example, if you are reading a comma separated file or a tab separated file that has the variable names on the first line, then use firstobs=2 to tell SAS to begin reading at the second line (so it will ignore the first line with the names ...
4.When a DATA step or PROC can do the same job,consider using procedures whenever possible.Procedures are tried-and-proven throughout the world's SAS installations,testing requirements is considerably less. 如果data步和proc步能完成同一个任务,尽量用proc步...
Data Step Proc Step SAS 输出结果 5.4 SAS注释 SAS代码中的注释以两种方式指定。 以下是这两种格式。 *信息类型注释 ``` 单行注释 * This is comment ; 多行注释 * This is first line of the comment * This is second line of the comment; ``` / * message * /类型注释 单行注释 /* This is ...
Data Integration with the Merge Table Step In this video, you learn how to use the Merge Table step in SAS Studio Flows. An example demonstrates how to “upsert” (update and insert) data in a target table using new data from a source table. ...