> I have a large data structure that looks like: > >> strsplit(st,",")[14395] > [1] "KGEG" > [2] "SA => KGEG" > [3] "72785" > [4] "47.62139" > [5] "-117.52778" > [6] "723" > [7] "WA" > [8] "US" > [9] "2" > [10] "SPOKANE SPOKANE INTERNATIONAL AIRPORT" > [11] "1" > > > I'd like to be able to retrieve, for example, the latitude > as.numeric(strsplit(st,",")[[14395]][4]) and longitude > as.numeric(strsplit(st,",")[[14395]][5]) for the entry in the structure > where strsplit(st,",")[[14395]][5])=="KGEG" by specifying various station > IDs. That is, if I had a simpler structure I could formulate a > logical index which would have something along the lines of > as.numeric(st[st[1]=="KSEA"][4]) and it would return 47.62139.
Too confusing for me. I'd just convert it to a data frame. ## UNTESTED!!! stm <- t(matrix(st,nrow=11)) stdf <- data.frame(stm) stdf[stdf[,1]=="KSEA",4] ## <OPTIONAL> - just makes life easier later ## do some "as.numeric" calls to various columns. stdf[,x] <- as.numeric(stdf[,x]) ## add some names names(stdf) <- c("blah",...) ## </OPTIONAL> Cheers Jason ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html