Hi You probably can do also only
Irig.tot <- (Irrig>HM)*6.123 to get desired vector without any further typing around. Logical vector can be treated as c(0,1) vector. FALSE equals zero and TRUE equals 1 on calculations. Maybe you shall spend some time reading R intro manual which can serve you as an excellent starting point to learn R. Although it has one hundred pages it is quite readable and you may find it as a best present you found under Christmas tree. Cheers Petr From: Makram Belhaj Fraj [mailto:belhajfraj.mak...@gmail.com] Sent: Tuesday, December 29, 2015 9:12 PM To: PIKAL Petr Cc: r-help@r-project.org Subject: RE: [R] need for help for solving operations in a vector Hi Petr I do thé calculation left as follows Irrig=qWC1 Irrig [Irrig>HM]=-1 Irrig[Irrig>0]=0 Irrig.tot=-Irrig*6.123 #6.123 is the hydraulic conductivity at saturation And I got the vector needed Cheers Makram Le 28 déc. 2015 12:15, "PIKAL Petr" <petr.pi...@precheza.cz<mailto:petr.pi...@precheza.cz>> a écrit : Hi On top of answers you have got here is some plotting you need to answer yourself plot(qWC1, col=(c(0, diff(qWC1))>=0 )+1) Which from those red points you want to be included in irrigation period? All of them? Only part? Which part? Based on your figures you probably will not get 100% correct answer. Cheers Petr > -----Original Message----- > From: R-help > [mailto:r-help-boun...@r-project.org<mailto:r-help-boun...@r-project.org>] On > Behalf Of Makram > Belhaj Fraj > Sent: Wednesday, December 23, 2015 8:35 AM > To: r-help@r-project.org<mailto:r-help@r-project.org>; > r-help-ow...@r-project.org<mailto:r-help-ow...@r-project.org> > Subject: [R] need for help for solving operations in a vector > > Dear colleagues > i need your generous help to solve the following problem > > I have a soil moisture time series qWC1 (61 values) > > qWC1 > 75.33336 75.20617 75.20617 74.95275 74.95275 74.70059 74.70059 > 74.70059 > 74.57498 74.44968 74.32469 74.07563 85.57237 90.40123 90.73760 > 90.73760 90.73760 90.73760 90.90648 91.07582 91.24564 90.90648 86.82135 > 80.69793 > 79.30393 78.62058 78.21484 77.81226 77.67876 77.41279 77.28032 76.88495 > 76.75383 76.75383 76.49260 76.36249 76.23270 76.23270 76.10325 > 75.97412 > 75.84532 75.71685 75.71685 75.71685 75.71685 75.46087 75.46087 > 75.46087 > 75.33336 75.20617 75.20617 75.20617 75.20617 75.20617 75.20617 75.07930 > 75.07930 75.07930 74.95275 74.95275 74.95275 > > I want to measure consecutive increases corresponding to irrigation and > consecutive decreases corresponding to recharge I wrote the following > code and it does not calculate for each increment in i? > also note that I choose to not use diff command in time series because > I want also that "plateaux" corresponding to a minimum of 2 equal > consecutive values are accounted as positive differences=irrigations so > when x[i+1]==x[i] the difference y might be equal to the previous value > xi > > following the code i wrote > > x<-ts(qWC1,start=1, end=61, frequency=1) x[1] plot(x, type="h", col = > "green") > y<-rep(0,61) > for (i in 1:61) { > if (x[i+1] > x[i]){ > y[i]==x[i+1]-x[i] > } else if (x[i+1]==x[i]){ > y[i]=x[i+2]-x[i] > } else { > y[i]==x[i+1]-x[i] > } > > } > plot(y, type="h", col = "blueviolet") > > Many thank > Makram > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org<mailto:R-help@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. ________________________________ Tento e-mail a jakékoliv k němu připojené dokumenty jsou důvěrné a jsou určeny pouze jeho adresátům. 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