Hi My name is SuBin-Jung from Korea. I can't write english well. so, understand me please. I used R Gui(64-bit) program. And in program, I imported this csv file named "emp.csv" emp.csv --------------------------------------------- empno,ename,job,mgr,hiredate,sal,comm,deptno 7369,SMITH,CLERK,7902,1980-12-17,800,,20 7499,ALLEN,SALESMAN,7698,1981-02-20,1600,300,30 7521,WARD,SALESMAN,7698,1981-02-03,1250,500,30 7566,JONES,MANAGER,7839,1981-03-02,2975,,20 7654,MARTIN,SALESMAN,7698,1981-10-22,1250,1400,30 7698,BLAKE,MANAGER,7839,1981-05-01,2850,,30 7782,CLARK,MANAGER,7839,1981-09-06,2450,,10 7788,SCOTT,ANALYST,7566,1982-12-08,3000,,20 7839,KING,PRESIDENT,,1981-11-17,5000,,10 7844,TURNER,SALESMAN,7698,1984-10-08,1500,,30 7876,ADAMS,CLERK,7788,1983-01-12,1100,,20 7900,JAMES,CLERK,7698,1981-12-03,950,,30 7902,FORD,ANALYST,7566,1981-12-13,3000,,20 7934,MILLER,CLERK,7782,1982-01-25,1300,,10 ---------------------------------------------- Then I used command "read.csv" ==> read.csv("emp.csv") And I tried to find emp$ename with first alphabet 'A'. So I inserted this command on program : > subset(emp, ename==grep("^A+",ename,value=TRUE), select=c("ename","sal")) But the result is not found. After that I tried to other alphabets( B,S,W....) > subset(emp, ename==grep("^S+",ename,value=TRUE), select=c("ename","sal")) Then I can find two data. ename sal 1 SMITH 800 8 SCOTT 3000
Why can't I find emp$ename with first alphavet 'A'?? I think this is error. Please give me answer, sir. [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.