baccts
2015-Jul-28 20:25 UTC
[R] indices of mismatch element in two vector with missing values
How would you return the index where two vectors differs if they may contain
missing (NA) values?
For example:
test1 <- c("1","2",NA);
test2 <- c("1","2","3");
which(test1!=test2) does not return 3!
Thanks in advance.
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Peter Alspach
2015-Jul-29 04:58 UTC
[R] indices of mismatch element in two vector with missing values
One way ....
seq(test1)[-which(test1==test2)]
but I imagine there are better ones .....
Peter Alspach
-----Original Message-----
From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of baccts
Sent: Wednesday, 29 July 2015 8:26 a.m.
To: r-help at r-project.org
Subject: [R] indices of mismatch element in two vector with missing values
How would you return the index where two vectors differs if they may contain
missing (NA) values?
For example:
test1 <- c("1","2",NA);
test2 <- c("1","2","3");
which(test1!=test2) does not return 3!
Thanks in advance.
--
View this message in context:
http://r.789695.n4.nabble.com/indices-of-mismatch-element-in-two-vector-with-missing-values-tp4710497.html
Sent from the R help mailing list archive at Nabble.com.
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Hervé Pagès
2015-Jul-29 05:51 UTC
[R] indices of mismatch element in two vector with missing values
Hi, On 07/28/2015 01:25 PM, baccts wrote:> How would you return the index where two vectors differs if they may contain > missing (NA) values? > For example: > test1 <- c("1","2",NA); > test2 <- c("1","2","3"); > which(test1!=test2) does not return 3!which(test1 != test2 | is.na(test1) != is.na(test2)) Cheers, H.> > Thanks in advance. > > > > > > > -- > View this message in context: http://r.789695.n4.nabble.com/indices-of-mismatch-element-in-two-vector-with-missing-values-tp4710497.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. >-- Herv? Pag?s Program in Computational Biology Division of Public Health Sciences Fred Hutchinson Cancer Research Center 1100 Fairview Ave. N, M1-B514 P.O. Box 19024 Seattle, WA 98109-1024 E-mail: hpages at fredhutch.org Phone: (206) 667-5791 Fax: (206) 667-1319
Hervé Pagès
2015-Jul-29 06:07 UTC
[R] indices of mismatch element in two vector with missing values
On 07/28/2015 09:58 PM, Peter Alspach wrote:> One way .... > > seq(test1)[-which(test1==test2)]One question is whether 2 NAs should be considered to match or not. The OP doesn't tell but I guess he wants them to match: test1 <- c("1", "2", NA, "4", NA, "6") test2 <- c("1", "2", "3", NA, NA, "66") seq(test1)[-which(test1==test2)] # [1] 3 4 5 6 5 should probably not be there! H.> > but I imagine there are better ones ..... > > Peter Alspach > > -----Original Message----- > From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of baccts > Sent: Wednesday, 29 July 2015 8:26 a.m. > To: r-help at r-project.org > Subject: [R] indices of mismatch element in two vector with missing values > > How would you return the index where two vectors differs if they may contain missing (NA) values? > For example: > test1 <- c("1","2",NA); > test2 <- c("1","2","3"); > which(test1!=test2) does not return 3! > > Thanks in advance. > > > > > > > -- > View this message in context: http://r.789695.n4.nabble.com/indices-of-mismatch-element-in-two-vector-with-missing-values-tp4710497.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see 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. > The contents of this e-mail are confidential and may be ...{{dropped:14}} > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. >-- Herv? Pag?s Program in Computational Biology Division of Public Health Sciences Fred Hutchinson Cancer Research Center 1100 Fairview Ave. N, M1-B514 P.O. Box 19024 Seattle, WA 98109-1024 E-mail: hpages at fredhutch.org Phone: (206) 667-5791 Fax: (206) 667-1319