Hi everyone I am trying to use grep in a for loop to compare a string value. It works if I use the actual index value but when I use the for loop index, it doesn't work. Any suggestions plz.
Here is the code: data <- read.table(file="Sigmoid.csv", head=FALSE, sep=","); c1 <- data$V1 c2 <- data$V2 c3 <- data$V3 c1data <- data.frame(c1); c2data <- data.frame(c2); c3data <- data.frame(c3); #this works p <- grep("QueryItem",c1data["147",],value=FALSE,fixed=FALSE) print(p) # print 1 #doesn't work i<-147 p1 <- grep("QueryItem",c1data["i",],value=FALSE,fixed=FALSE) print(p1) # prints 0 for(i in 137:270) { print(i) p <- grep("QueryItem",c1data["i",],value=FALSE,fixed=FALSE) p2 <- p print(p2) if(length(p)>0) { print(p) } } ______________________________________________ R-help@r-project.org mailing list 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.