difference between successive values
I mean the first row value ?n Vin, 4 mar. 2016, 16:15 Jeff Newmiller, <jdnewmil at dcn.davis.ca.us> a scris:
"Keep the first values" is imprecise, but mixing an absolute value with a bunch of differences doesn't usually work out well. I frequently choose among x <- sample( 10 ) dxright <- c( 0, diff(x) ) dxleft <- c( diff(x), 0 ) for calculation purposes depending on my needs. -- Sent from my phone. Please excuse my brevity. On March 4, 2016 3:28:08 AM PST, Olivier Crouzet < olivier.crouzet at univ-nantes.fr> wrote:
Hi, (1) You should provide a minimal working example; (2) But anyway, does... x = sample(10) c(x[1],diff(x)) ... do what you want? Olivier. On Fri, 4 Mar 2016 13:22:07 +0200 catalin roibu <catalinroibu at gmail.com> wrote:
Dear all! I want to calculate difference between successive values (cumulative values) with R. I used diff function, but I want to keep the first values. Please help me to solve this problem! Thank you! Best regards! CR -- - - Catalin-Constantin ROIBU ? Lecturer PhD, Forestry engineer Forestry Faculty of Suceava Str. Universitatii no. 13, Suceava, 720229, Romania office phone +4 0230 52 29 78, ext. 531 mobile phone +4 0745 53 18 01 FAX: +4 0230 52 16 64 silvic.usv.ro <http://www.usv.ro/> [[alternative HTML version deleted]]
______________________________________________ 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.
-- Olivier Crouzet, PhD Laboratoire de Linguistique de Nantes -- UMR6310 CNRS / Universit? de Nantes Chemin de la Censive du Tertre -- BP 81227 44312 Nantes cedex 3 France http://www.lling.univ-nantes.fr/
______________________________________________ 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.
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______________________________________________ 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.
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Catalin-Constantin ROIBU
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Lecturer PhD, Forestry engineer
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Forestry Faculty of Suceava
Str. Universitatii no. 13, Suceava, 720229,
office phone +4 0230 52 29 78, ext. 531
mobile phone +4 0745 53 18 01
+4 0766 71 76 58
FAX: +4 0230 52 16 64
silvic.usv.ro <http://www.usv.ro/>
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