[GRASS-user] v.class.mlR error

[Moritz Lennert]

Le 10 novembre 2016 15:45:59 GMT+01:00, James Duffy <james.philip.duffy at gmail.com> a écrit :
>Hello,
>
>I'm trying to run v.class.mlR on a vector map, with a separate vector
>map
>containing my training data. Currently I have two classes '1' and '2'
>stored in the column 'class'. My region is set to that of the segments
>to
>be classified. I run the following command:
>
>v.class.mlR segments_map=gp_seg_stats_vec at gp1 \
>training_map=gp_seg_sed_grass at gp1 train_class_column=class \
>output_class_column=vote output_prob_column=prob folds=5 \
>partitions=10 tunelength=10 weighting_metric=accuracy
>
>And get the following output:
>
>Running R now. Following output is R output.
>Loading required package: caret
>Loading required package: lattice
>Loading required package: ggplot2
>Loading required package: kernlab
>
>Attaching package: ‘kernlab’
>
>The following object is masked from ‘package:ggplot2’:
>
>    alpha
>
>Loading required package: randomForest
>randomForest 4.6-12
>Type rfNews() to see new features/changes/bug fixes.
>
>Attaching package: ‘randomForest’
>
>The following object is masked from ‘package:ggplot2’:
>
>    margin
>
>Loading required package: rpart
>Error in eval(expr, envir, enclos) : object 'cat_' not found
>Calls: data.frame ... predict.train -> model.frame ->
>model.frame.default
>-> eval -> eval
>Execution halted
>ERROR: There was an error in the execution of the R script.
>       Please check the R output.
>
>
>I'm not entirely sure where it's looking for anything called 'cat_'.
>
>Any help much appreciated please.


Could you send us the output of v.info -c for both of the input maps ?

Moritz