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error occurs during training #39

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zkkao opened this issue Jan 12, 2022 · 4 comments
Open

error occurs during training #39

zkkao opened this issue Jan 12, 2022 · 4 comments

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@zkkao
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zkkao commented Jan 12, 2022

Dear Authors:

I use R version 4.1.2 and run commands line by line in the script of Qoala_T_B_subset_based_github.R. An error occurs during training step:

rf.tune = train(y=training$Rating,
x=subset(training, select=-c(Rating)),
method = "rf",
metric = "ROC",
trControl = ctrl,
ntree = 501,
tuneGrid=expand.grid(mtry = c(8)),
verbose=FALSE)

and the error message is:

Error in apply(testOutput[, lev], 1, function(x) x/sum(x)) :
dim(X) must have a positive length
Calls: train -> train.default -> evalSummaryFunction -> t -> apply
Execution halted

Is there any suggestion?
@larawierenga
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larawierenga commented Jan 12, 2022 via email

@zkkao
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zkkao commented Jan 13, 2022

Hi Lara,
I have confirm that there isn't any missing value in rating column. And training set include all data and columns. The dimension of my training set is [79, 186]. The version of caret is 6.0-90. Can you give some advise.

@larawierenga
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larawierenga commented Jan 17, 2022 via email

@zkkao
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zkkao commented Jan 18, 2022

Hi Lara,
The MRI data was processed by Freesurfer v7.1.1.

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@larawierenga @zkkao