search for: prevenzion

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weighted average grouped by variables
2017 Nov 09
0
weighted average grouped by variables
...ot;date_time" and "type"? to be noted the complication of the case "motorcycle" (not present in both directions) any help for that? thank you max -- ------------------------------------------------------------ Massimo Bressan ARPAV Agenzia Regionale per la Prevenzione e Protezione Ambientale del Veneto Dipartimento Provinciale di Treviso Via Santa Barbara, 5/a 31100 Treviso, Italy tel: +39 0422 558545 fax: +39 0422 558516 e-mail: massimo.bressan at arpa.veneto.it ------------------------------------------------------------ [[alternative HTML versi...
weighted average grouped by variables
2017 Nov 09
1
weighted average grouped by variables
...on of the case "motorcycle" (not present in both > directions) > > any help for that? > > thank you > > max > > > > -- > > ------------------------------------------------------------ > Massimo Bressan > > ARPAV > Agenzia Regionale per la Prevenzione e > Protezione Ambientale del Veneto > > Dipartimento Provinciale di Treviso > Via Santa Barbara, 5/a > 31100 Treviso, Italy > > tel: +39 0422 558545 > fax: +39 0422 558516 > e-mail: massimo.bressan at arpa.veneto.it > -------------------------------------------------...
weighted average grouped by variables
2017 Nov 09
4
weighted average grouped by variables
hi all I have this dataframe (created as a reproducible example) mydf<-structure(list(date_time = structure(c(1508238000, 1508238000, 1508238000, 1508238000, 1508238000, 1508238000, 1508238000), class = c("POSIXct", "POSIXt"), tzone = ""), direction = structure(c(1L, 1L, 1L, 1L, 2L, 2L, 2L), .Label = c("A", "B"), class =
weighted average grouped by variables
2017 Nov 09
0
weighted average grouped by variables
...is. Vanaf dan ben je welkom op het nieuwe adres: Havenlaan 88 bus 73, 1000 Brussel. /////////////////////////////////////////////////////////////////////////////////////////// -- ------------------------------------------------------------ Massimo Bressan ARPAV Agenzia Regionale per la Prevenzione e Protezione Ambientale del Veneto Dipartimento Provinciale di Treviso Via Santa Barbara, 5/a 31100 Treviso, Italy tel: +39 0422 558545 fax: +39 0422 558516 e-mail: massimo.bressan at arpa.veneto.it ------------------------------------------------------------ [[alternative HTML versio...
assign NA to rows by test on multiple columns of a data frame
2017 Nov 22
0
assign NA to rows by test on multiple columns of a data frame
Hello, Try the following. icol <- which(grepl("flag", names(mydf))) mydf[icol] <- lapply(mydf[icol], function(x){ is.na(x) <- x == 0 x }) mydf # A A_flag B B_flag #1 8 10 5 12 #2 7 NA 6 9 #3 10 1 2 NA #4 1 NA 1 5 #5 5 2 0 NA Hope this helps, Rui Barradas On 11/22/2017 10:34 AM, Massimo Bressan
assign NA to rows by test on multiple columns of a data frame
2017 Nov 22
1
assign NA to rows by test on multiple columns of a data frame
...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. > -- ------------------------------------------------------------ Massimo Bressan ARPAV Agenzia Regionale per la Prevenzione e Protezione Ambientale del Veneto Dipartimento Provinciale di Treviso Via Santa Barbara, 5/a 31100 Treviso, Italy tel: +39 0422 558545 fax: +39 0422 558516 e-mail: massimo.bressan at arpa.veneto.it
weighted average grouped by variables
2017 Nov 09
2
weighted average grouped by variables
...on of the case "motorcycle" (not present in both > directions) > > any help for that? > > thank you > > max > > > > -- > > ------------------------------------------------------------ > Massimo Bressan > > ARPAV > Agenzia Regionale per la Prevenzione e > Protezione Ambientale del Veneto > > Dipartimento Provinciale di Treviso > Via Santa Barbara, 5/a > 31100 Treviso, Italy > > tel: +39 0422 558545 > fax: +39 0422 558516 > e-mail: massimo.bressan at arpa.veneto.it > -------------------------------------------------...
weighted average grouped by variables
2017 Nov 11
0
weighted average grouped by variables
...ns) >> >> any help for that? >> >> thank you >> >> max >> >> >> >> -- >> >> ------------------------------------------------------------ >> Massimo Bressan >> >> ARPAV >> Agenzia Regionale per la Prevenzione e >> Protezione Ambientale del Veneto >> >> Dipartimento Provinciale di Treviso >> Via Santa Barbara, 5/a >> 31100 Treviso, Italy >> >> tel: +39 0422 558545 >> fax: +39 0422 558516 >> e-mail: massimo.bressan at arpa.veneto.it >> -------...
assign NA to rows by test on multiple columns of a data frame
2017 Nov 22
6
assign NA to rows by test on multiple columns of a data frame
Given this data frame (a simplified, essential reproducible example) A<-c(8,7,10,1,5) A_flag<-c(10,0,1,0,2) B<-c(5,6,2,1,0) B_flag<-c(12,9,0,5,0) mydf<-data.frame(A, A_flag, B, B_flag) # this is my initial df mydf I want to get to this final situation i<-which(mydf$A_flag==0) mydf$A[i]<-NA ii<-which(mydf$B_flag==0) mydf$B[ii]<-NA