Re: [R] Find the first values in vector
Thank You All Very Much :jumping: Dimitris Rizopoulos-4 wrote: > > yet another solution is: > > vec <- c(TRUE, TRUE, TRUE, TRUE, FALSE, FALSE, FALSE, FALSE, TRUE, TRUE, > FALSE) > > seq_len(rle(vec)$lengths[1]) > > > I hope it helps. > > Best, > Dimitris > > > Grzes wrote: >> Hi ! >> I have a vector: >> vec= TRUE TRUE TRUE TRUE FALSE FALSE FALSE FALSE TRUE TRUE FALSE >> and I'm looking for a method which let me get only the first values equal >> TRUE from this vector. It means that I want to get a vector: >> vec_out = TRUE TRUE TRUE TRUE >> >> or posictions values = TRUE: vec_out = 1,2,3,4 > > -- > Dimitris Rizopoulos > Assistant Professor > Department of Biostatistics > Erasmus University Medical Center > > Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands > Tel: +31/(0)10/7043478 > Fax: +31/(0)10/7043014 > > __ > 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. > > -- View this message in context: http://old.nabble.com/Find-the-first-values-in-vector-tp26271555p26273429.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.
Re: [R] Find the first values in vector
Thank You All Very Much :jumping: baptiste auguie-5 wrote: > > Hi, > > One way would be, > > vec[ cumsum(!vec)==0 ] > > HTH, > > baptiste > > 2009/11/9 Grzes : >> >> Hi ! >> I have a vector: >> vec= TRUE TRUE TRUE TRUE FALSE FALSE FALSE FALSE TRUE TRUE FALSE >> and I'm looking for a method which let me get only the first values equal >> TRUE from this vector. It means that I want to get a vector: >> vec_out = TRUE TRUE TRUE TRUE >> >> or posictions values = TRUE: vec_out = 1,2,3,4 >> -- >> View this message in context: >> http://old.nabble.com/Find-the-first-values-in-vector-tp26271555p26271555.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. >> > > __ > 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. > > -- View this message in context: http://old.nabble.com/Find-the-first-values-in-vector-tp26271555p26273390.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.
Re: [R] Find the first values in vector
yet another solution is: vec <- c(TRUE, TRUE, TRUE, TRUE, FALSE, FALSE, FALSE, FALSE, TRUE, TRUE, FALSE) seq_len(rle(vec)$lengths[1]) I hope it helps. Best, Dimitris Grzes wrote: Hi ! I have a vector: vec= TRUE TRUE TRUE TRUE FALSE FALSE FALSE FALSE TRUE TRUE FALSE and I'm looking for a method which let me get only the first values equal TRUE from this vector. It means that I want to get a vector: vec_out = TRUE TRUE TRUE TRUE or posictions values = TRUE: vec_out = 1,2,3,4 -- Dimitris Rizopoulos Assistant Professor Department of Biostatistics Erasmus University Medical Center Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands Tel: +31/(0)10/7043478 Fax: +31/(0)10/7043014 __ 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] Find the first values in vector
Try this: head(vec, sum(cumprod(vec))) The positions: which(head(vec, sum(cumprod(vec On Mon, Nov 9, 2009 at 4:44 PM, Grzes wrote: > > Hi ! > I have a vector: > vec= TRUE TRUE TRUE TRUE FALSE FALSE FALSE FALSE TRUE TRUE FALSE > and I'm looking for a method which let me get only the first values equal > TRUE from this vector. It means that I want to get a vector: > vec_out = TRUE TRUE TRUE TRUE > > or posictions values = TRUE: vec_out = 1,2,3,4 > -- > View this message in context: > http://old.nabble.com/Find-the-first-values-in-vector-tp26271555p26271555.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. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O __ 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] Find the first values in vector
Hi, One way would be, vec[ cumsum(!vec)==0 ] HTH, baptiste 2009/11/9 Grzes : > > Hi ! > I have a vector: > vec= TRUE TRUE TRUE TRUE FALSE FALSE FALSE FALSE TRUE TRUE FALSE > and I'm looking for a method which let me get only the first values equal > TRUE from this vector. It means that I want to get a vector: > vec_out = TRUE TRUE TRUE TRUE > > or posictions values = TRUE: vec_out = 1,2,3,4 > -- > View this message in context: > http://old.nabble.com/Find-the-first-values-in-vector-tp26271555p26271555.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. > __ 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] Find the first values in vector
Use which() vec_out <- which(vec == T) - Justin Montemarano Graduate Student Kent State University - Biological Sciences http://www.montegraphia.com [[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] Find the first values in vector
How about vec[1:min(which(vec==FALSE))-1] This will return a character(0) vector if vec[1] is FALSE Nikhil On 9 Nov 2009, at 2:38PM, David Winsemius wrote: vec= TRUE TRUE TRUE TRUE FALSE FALSE FALSE FALSE TRUE TRUE FALSE __ 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] Find the first values in vector
On Nov 9, 2009, at 1:44 PM, Grzes wrote: Hi ! I have a vector: vec= TRUE TRUE TRUE TRUE FALSE FALSE FALSE FALSE TRUE TRUE FALSE and I'm looking for a method which let me get only the first values equal TRUE from this vector. It means that I want to get a vector: vec_out = TRUE TRUE TRUE TRUE or posictions values = TRUE: vec_out = 1,2,3,4 ?rle > vec[ 1:rle(vec)$lengths[1] ] [1] "TRUE" "TRUE" "TRUE" "TRUE" Although that approach would faid if the first element were "FALSE". -- View this message in context: http://old.nabble.com/Find-the-first-values-in-vector-tp26271555p26271555.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. David Winsemius, MD Heritage Laboratories West Hartford, CT __ 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] Find the first values in vector
Hi ! I have a vector: vec= TRUE TRUE TRUE TRUE FALSE FALSE FALSE FALSE TRUE TRUE FALSE and I'm looking for a method which let me get only the first values equal TRUE from this vector. It means that I want to get a vector: vec_out = TRUE TRUE TRUE TRUE or posictions values = TRUE: vec_out = 1,2,3,4 -- View this message in context: http://old.nabble.com/Find-the-first-values-in-vector-tp26271555p26271555.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.
