Hi,
your example is quite messy (neither reproducible or minimal). I think
you could try the following,
mdf <- data.frame(1:3)
names(mdf) <- "147"
i <- 147
mdf[ as.character(i) ]
Hope this helps,
baptiste
On 11 Mar 2009, at 22:34, Mohan Singh wrote:
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) }
}
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_____________________________
Baptiste Auguié
School of Physics
University of Exeter
Stocker Road,
Exeter, Devon,
EX4 4QL, UK
Phone: +44 1392 264187
http://newton.ex.ac.uk/research/emag
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
