Re: [R] $ opetator is invalid for atomic vectors

Rui Barradas Mon, 24 Feb 2020 10:05:03 -0800

Hello,

Please cc the list.
Yes, I believe so, it's hard to say, the code is not reproducible.
But that's what the docs say. Why not try it?


Hope this helps,

Rui Barradas

Às 16:00 de 24/02/20, javed khan escreveu:

Thanks for your feedback Rui.. It means I have to specify the "mod" inthe resamples (based on the code below) instead of ga_res? mod here isthe train function of caret?


resamples(list( First_data= mod, Second_data=mod2)

My sample code is here

obj <- function(param, maximize = FALSE) {
   print(param)
   mod <- train(Result ~ ., data = tr,
                method = "gbm",
                metric = "MAE",
                trControl = ctrl

tuneGrid = data.frame(n.trees =(param[1]), interaction.depth = (param[2]), shrinkage=(param[3]),n.minobsinnode=(param[4])))


                 if(maximize)
     -getTrainPerf(mod)[, "TrainMAE"] else
       getTrainPerf(mod)[, "TrainMAE"]
}

Then GA function

library(GA)
set.seed(45642)
ga_res <- ga(type = "real-valued",
              fitness = svm_obj,
              min = c(0.5,0), max = c(1,1),

              maxiter = ceiling(num_mods),
              maximize = TRUE)
ga_res@solution

On Mon, Feb 24, 2020 at 2:03 PM Rui Barradas <ruipbarra...@sapo.pt<mailto:ruipbarra...@sapo.pt>> wrote:


    Hello,

    If you are using function resamples from package caret, just read its
    help page. From ?resamples, section Arguments:

    Arguments

    x
    a list of two or more objects of class train, sbf or rfe with a common
    set of resampling indices in the control object. For sort.resamples, it
    is an object generated by resamples.


    Your x argument is not an object of one of those classes. You are
    passing the function a list of 2 numeric values, not an object
    resembling the examples in that help page.


    Hope this helps,

    Rui Barradas


    Às 11:35 de 24/02/20, javed khan escreveu:
     > Hello
     >
     > I am using genetic algorithm for some optimization problem. I
    executed it
     > with 2 types of data and get results like
     >
     > GA=40
     > GA2=60
     >
     > When I combine it with resamples
     >
     > Value=resamples (list (GA, GA2))
     >
     > It gives me the error
     >
     > $ operator is invalid for atomic vectors.
     >
     > What should be the issue here?
     >
     > Thanks
     >
     >       [[alternative HTML version deleted]]
     >
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Re: [R] $ opetator is invalid for atomic vectors

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