Try d3 <- embed( c( NA, NA, dta$MEI ), 3)
-- Sent from my phone. Please excuse my brevity. On January 30, 2017 9:28:52 AM PST, Kwesi Quagraine <starskykw...@gmail.com> wrote: >Upon trying this method, I get an error ; > >Error in `$<-.data.frame`(`*tmp*`, "MEImeans", value = >c(0.313162987462034, : > replacement has 442 rows, data has 444 > >Any thoughts? > >Kwesi > >On Mon, Jan 30, 2017 at 5:37 PM, PIKAL Petr <petr.pi...@precheza.cz> >wrote: > >> Hi >> >> Probably just a small correction. >> >> d3 <- embed( dta$MEI, 3) >> >> Cheers >> Petr >> >> > -----Original Message----- >> > From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of >Jeff >> > Newmiller >> > Sent: Monday, January 30, 2017 4:19 PM >> > To: r-help@r-project.org; Kwesi Quagraine <starskykw...@gmail.com> >> > Subject: Re: [R] (no subject) >> > >> > How you proceed depends on how consistent the data are and on what >you >> > want to do with those sets of three months after you have >identified >> them. >> > >> > One approach is to create a matrix where each row contains the >values >> > corresponding to the "second previous", "previous", and "current" >months >> > data, respectively using the embed() function. The first two rows >would >> be >> > incomplete because the earlier data are missing there: >> > >> > d3 <- embed( dta$MEI ) >> > >> > with which you could compute whatever metric you wanted. For >example >> > you could compute rolling means: >> > >> > dta$MEImeans <- rowMeans( d3 ) >> > >> > If your data have missing rows you might need to use the aggregate >or >> > merge functions instead. >> > >> > For specific layouts of data or metrics you can find specialized >> functions in >> > various packages. You might want to search using the R "sos" >package or >> > Google for your analysis method of choice. >> > -- >> > Sent from my phone. Please excuse my brevity. >> > >> > On January 30, 2017 6:11:48 AM PST, Kwesi Quagraine >> > <starskykw...@gmail.com> wrote: >> > >Hello, I have a data with two variables nodes and index, I want to >> > >extract >> > >3 months seasons, with a shift of 1 month, that is, DJF, JFM, FMA >etc >> > >to OND. Was wondering how to go about it. Kindly find data sample >> > >below, data is in csv format. >> > >Any help will be appreciated. >> > > >> > >My data sample; >> > > >> > > era...1. Node_freq MEI >> > >1 1980-01-01 -0.389855332 0.3394196488 >> > >2 1980-02-01 -0.728019153 0.2483738232 >> > >3 1980-03-01 -1.992457784 0.3516954904 >> > >4 1980-04-01 0.222760284 0.5736836269 >> > >5 1980-05-01 0.972601798 0.6289249144 >> > >6 1980-06-01 0.570725954 0.5736836269 >> > >7 1980-07-01 -0.977966324 0.4120517119 >> > >8 1980-08-01 0.056128836 -0.0104418383 >> > >9 1980-09-01 0.987304573 -0.0687520861 >> > >10 1980-10-01 1.188242495 -0.1403611624 >> > >11 1980-11-01 1.693037763 -0.0963727298 >> > >12 1980-12-01 1.173539720 -0.2539126977 >> > >13 1981-01-01 0.423698206 -0.6140040528 >> > >14 1981-02-01 -2.208098481 -0.5209122536 >> > >15 1981-03-01 -0.786830252 0.1133395650 >> > >16 1981-04-01 -0.110502611 0.3302127675 >> > >17 1981-05-01 -1.272021820 -0.1894645290 >> > >18 1981-06-01 0.394292656 -0.3736021538 >> > >19 1981-07-01 1.452892441 -0.4032687711 >> > >20 1981-08-01 0.698150002 -0.4441882433 >> > >21 1981-09-01 0.997106423 -0.1720737534 >> > >22 1981-10-01 0.247264908 -0.2436828296 >> > >23 1981-11-01 0.771663876 -0.3909929295 >> > >24 1981-12-01 -0.316341458 -0.4943145967 >> > > >> > >Regards, >> > >Kwesi >> > > >> > >-- >> > >Try not to become a man of success but rather a man of >value-Albert >> > >Einstein >> > > >> > >University of Cape Coast|College of Agriculture and Natural >> > >Sciences|Department >> > >of Physics| >> > >Team Leader|Recycle Up! 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