[R] cut variable within a loop

[Thierry Onkelinx]

Dear Janka,

You loop goes for 0 to 100. It should probably go from 1:99

Best regards,

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and
Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium

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2015-08-11 14:38 GMT+02:00 Janka Vanschoenwinkel <
janka.vanschoenwinkel op uhasselt.be>:

> Dear list members,
>
> I have a loop where I want to do several calculations for different samples
> and save the results for each sample. These samples are for each loop
> different. I want to use the "i" in the loop to cut the samples.
>
> So for instance:
>
>    - In loop 1 (i=1), I have a sample from 0-1 and a sample from 1-100.
>    - In loop 2 (i=2), I have a sample from 0-2 and a sample from 2-100.
>    - In loop 99 (i=99), I have a sample from 0-99 and a sample from 99-100.
>
> I built the following function, but there is *a problem with the cut2
> function* since it doesn't recognize the "i". Outside the lapply loop it
> works, but not inside the loop.
>
> Could somebody please help me with this problem? Thanks a lot!
>
>
>
> d=data.frame(MEt_Rainfed=rep(0,100),MEp_Rainfed=rep(0,100),MEt_Irrigation=rep(0,100),MEp_Irrigation=rep(0,100))
>
>
>
>     o<-lapply(0:100, function(i){
>
>
>
>         Alldata$irri=cut2(Alldata$irrigation,i)
>
>         levels(Alldata$irri)<-c("0","1")
>
>
>
>        Alldata_Rainfed<-subset(Alldata, irri == 0)
>
>        Alldata_Irrigation<-subset(Alldata, irri == 1)
>
>
>
>     #calculations per sample, then store all the values per i and per
> variable in a dataframe: (the calculations are not shown in this example)
>
>
>
>      d[i, ] = c(MEt_Rainfed,MEp_Rainfed,MEt_Irrigation,MEp_Irrigation)
>
>
>
>    })
>
>
>
>    out<-as.data.frame(do.call(rbind, o))
>
>
> --
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