Error in { : task 1 failed - "could not find function "treeresponse""

[fridrichmrtn]

Hi guys,

I am running into the error described in the headline. The problem is probably related to probability response of the ctree2, could you please look into it and advise?

Thanks,

Br,

M.

Minimal reproducible example with dataset:

# load caret
library(caret)

# load data, get target and feature column labels
data(iris)
col_names = names(iris);target = "Species"
feature_names = col_names[col_names!=target]

# construct trainControl object for train method 
fit_control = trainControl(classProbs=T,
                           summaryFunction = multiClassSummary,
                           search="random")

# get results
ctree_fit = train(iris[,feature_names], iris[,target],
              method="ctree2",
              trControl=fit_control)

Session Info:

> sessionInfo()

R version 3.5.1 (2018-07-02)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows >= 8 x64 (build 9200)

Matrix products: default

locale:
[1] LC_COLLATE=Czech_Czechia.1250  LC_CTYPE=Czech_Czechia.1250    LC_MONETARY=Czech_Czechia.1250 LC_NUMERIC=C                  
[5] LC_TIME=Czech_Czechia.1250    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] caret_6.0-80         ggplot2_3.0.0        lattice_0.20-35      RevoUtils_11.0.1     RevoUtilsMath_11.0.0

[fridrichmrtn]

Workaround for toy example above is to load party manually, however, the bug still prevents using ctree2 from parallel tuning.

[topepo]

Give these changes a try.

The parallel part is difficult, mostly because different technologies do things differently. Thankfully @bwlewis is going to globally solve this in #1017 (jk 😃)

[fridrichmrtn]

Thanks Max, you guys are doing great work.

[topepo]

btw that change was included in the version of caret that hit CRAN yesterday.