[R] substr not by position but by symbol
Hi all, One of my variables looks like this: .7_-.3_-.2_.9 And this is a character variable. I made this by combining four different number like .7, -.3, -.2, and .9 using paste function. Now, I want to go back to original format from this one combined character variable. For instance, I want to extract 3rd number, -.2, from this character. I know I can use substr function, but each position is not fixed because sometimes each number has negative sign. Instead, it would be good if there is any extracting function which can extract character not by position but by specific symbol, in my case symbol '_'. Is there any similar function for doing in R? Thanks! YN [[alternative HTML version deleted]] __ 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.
Re: [R] substr not by position but by symbol
Hi YN, I use strsplit for this: x - .7_-.3_-.2_.9 strsplit(x, split = _) [[1]] [1] .7 -.3 -.2 .9 strsplit(x, split = _)[[1]][3] [1] -.2 Best, Ista On Mon, May 7, 2012 at 9:54 AM, YN Kim y2sile...@gmail.com wrote: Hi all, One of my variables looks like this: .7_-.3_-.2_.9 And this is a character variable. I made this by combining four different number like .7, -.3, -.2, and .9 using paste function. Now, I want to go back to original format from this one combined character variable. For instance, I want to extract 3rd number, -.2, from this character. I know I can use substr function, but each position is not fixed because sometimes each number has negative sign. Instead, it would be good if there is any extracting function which can extract character not by position but by specific symbol, in my case symbol '_'. Is there any similar function for doing in R? Thanks! YN [[alternative HTML version deleted]] __ 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. __ 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.
Re: [R] substr not by position but by symbol
Hello, YN wrote Hi all, One of my variables looks like this: .7_-.3_-.2_.9 And this is a character variable. I made this by combining four different number like .7, -.3, -.2, and .9 using paste function. Now, I want to go back to original format from this one combined character variable. For instance, I want to extract 3rd number, -.2, from this character. I know I can use substr function, but each position is not fixed because sometimes each number has negative sign. Instead, it would be good if there is any extracting function which can extract character not by position but by specific symbol, in my case symbol '_'. Is there any similar function for doing in R? Thanks! YN [[alternative HTML version deleted]] __ R-help@ 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. Yes there is. x - .7_-.3_-.2_.9 strsplit(x, _) # To get the numbers, not character vectors as.numeric(unlist(strsplit(x, _))) # Or sapply(strsplit(x, _), as.numeric) Hope this helps, Rui Barradas -- View this message in context: http://r.789695.n4.nabble.com/substr-not-by-position-but-by-symbol-tp4614869p4614889.html Sent from the R help mailing list archive at Nabble.com. __ 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.
