[R] dataframe in loop

hello all: I would like to thank those who helped me out of the string problem..but now I got another problem. I used R to query from SQL and got a list of crsp_fundno of G-style mutual funds which is still alive. I use the following codes and got what I want: library(RODBC) channel<-odbcConn

[R] string problems in R

Hello all I have been working on my thesis using R. I am a newbie to R and met a problem that bothered me for a while due to my lack of acquaintance of R. I am using R to query from SQL. I got a list of crsp_fundno of G-style mutual funds which is still alive. I use the following codes and got wh