[GRASS-user] v.class.mlR error

[Moritz Lennert]

Le 11 novembre 2016 10:21:11 GMT+01:00, James Duffy <james.philip.duffy at gmail.com> a écrit :
>On 10 November 2016 at 19:37, Moritz Lennert
><mlennert at club.worldonline.be>
>wrote:
>
>>
>>
>> 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
>?
>>
>
>v.info -c --verbose map=gp_seg_stats_vec at gp1
>
>INTEGER|cat
>DOUBLE PRECISION|area
>DOUBLE PRECISION|perimeter
>DOUBLE PRECISION|fd
>DOUBLE PRECISION|gpo1min
>DOUBLE PRECISION|com_circ
>DOUBLE PRECISION|gpo1max
>DOUBLE PRECISION|gpo1range
>DOUBLE PRECISION|gpo1mean
>DOUBLE PRECISION|gpo1stdev
>DOUBLE PRECISION|gpo1var
>DOUBLE PRECISION|gpo1sum
>DOUBLE PRECISION|gpo2min
>DOUBLE PRECISION|gpo2max
>DOUBLE PRECISION|gpo2range
>DOUBLE PRECISION|gpo2mean
>DOUBLE PRECISION|gpo2stdev
>DOUBLE PRECISION|gpo2var
>DOUBLE PRECISION|gpo3min
>DOUBLE PRECISION|gpo3max
>DOUBLE PRECISION|gpo3range
>DOUBLE PRECISION|gpo3mean
>DOUBLE PRECISION|gpo3stdev
>DOUBLE PRECISION|gpo3var
>DOUBLE PRECISION|gpo3sum
>DOUBLE PRECISION|gpo4min
>DOUBLE PRECISION|gpo4max
>DOUBLE PRECISION|gpo4range
>DOUBLE PRECISION|gpo4mean
>DOUBLE PRECISION|gpo4stdev
>DOUBLE PRECISION|gpo4var
>DOUBLE PRECISION|gpo4sum
>Displaying column types/names for database connection of layer <1>:
>(Fri Nov 11 09:17:34 2016) Command finished (0 sec)
>
>v.info -c --verbose map=gp_seg_sed_grass at gp1
>
>INTEGER|cat
>INTEGER|cat_

This is the problem. cat_ using the training data, but not in the segments file. Erasing this column from the training data should be enough to solve the problem.

Moritz

>DOUBLE PRECISION|area
>DOUBLE PRECISION|perimeter
>DOUBLE PRECISION|fd
>DOUBLE PRECISION|gpo1min
>DOUBLE PRECISION|com_circ
>DOUBLE PRECISION|gpo1max
>DOUBLE PRECISION|gpo1range
>DOUBLE PRECISION|gpo1mean
>DOUBLE PRECISION|gpo1stdev
>DOUBLE PRECISION|gpo1var
>DOUBLE PRECISION|gpo1sum
>DOUBLE PRECISION|gpo2min
>DOUBLE PRECISION|gpo2max
>DOUBLE PRECISION|gpo2range
>DOUBLE PRECISION|gpo2mean
>DOUBLE PRECISION|gpo2stdev
>DOUBLE PRECISION|gpo2var
>DOUBLE PRECISION|gpo3min
>DOUBLE PRECISION|gpo3max
>DOUBLE PRECISION|gpo3range
>DOUBLE PRECISION|gpo3mean
>DOUBLE PRECISION|gpo3stdev
>DOUBLE PRECISION|gpo3var
>DOUBLE PRECISION|gpo3sum
>DOUBLE PRECISION|gpo4min
>DOUBLE PRECISION|gpo4max
>DOUBLE PRECISION|gpo4range
>DOUBLE PRECISION|gpo4mean
>DOUBLE PRECISION|gpo4stdev
>DOUBLE PRECISION|gpo4var
>DOUBLE PRECISION|gpo4sum
>CHARACTER|type
>INTEGER|class
>Displaying column types/names for database connection of layer <1>:
>(Fri Nov 11 09:20:35 2016) Command finished (0 sec)
>
>
>>
>> Moritz
>>
>>
>>
>>
>James