[GRASS-user] v.class.mlR Error

[Moritz Lennert]

Hi Jamille,

On 29/05/18 21:38, Jamille Haarloo wrote:
> Dear GRASS GIS community,
> 
> I just started working with Grass to try some object-based analysis. I 
> do not have much experience with programming, but learning bits on the go.
> The segmentation test with uspo appears to have been ok, but I am 
> struggling with the next step. I was suspecting the training vector 
> created in QGIS wasn't meeting proper standards, but I could not find a 
> straightforward Grass module for labeling segments/ creating a training 
> set file.
> 
> Hopefully someone can help me out.
> 
> Command output:
> 
> (Tue May 29 14:18:32 2018)
> v.class.mlR -i --overwrite training_map=Training_Ben2 at haarlooj_Ben_Test 
> segments_file=C:\Users\haarlooj\Documents\CELOS\Stats_Training_Ben_test 
> separator=comma 
> raster_segments_map=best_myregion1_at_haarlooj_Ben_Test_rank1 at haarlooj_Ben_Test 
> train_class_column=code output_class_column=vote output_prob_column=prob 
> classifiers=svmRadial,rf,C5.0 folds=5 partitions=10 tunelength=10 
> weighting_modes=smv,qbwwv weighting_metric=accuracy 
> classification_results=X:\Projecten\Land-use Planning Marowijne\GIS en 
> RS\Werkfolder\GRASS\v.class.mIRR_optional_output\Ben_test_classifier-Results 
> accuracy_file=X:\Projecten\Land-use Planning Marowijne\GIS en 
> RS\Werkfolder\GRASS\v.class.mIRR_optional_output\Ben_Test_accuracy 
> model_details=X:\Projecten\Land-use Planning Marowijne\GIS en 
> RS\Werkfolder\GRASS\v.class.mIRR_optional_output\Ben_Test_ClassifierDetails 
> bw_plot_file=X:\Projecten\Land-use Planning Marowijne\GIS en 
> RS\Werkfolder\GRASS\v.class.mIRR_optional_output\Ben_test_classifier_performance 
> r_script_file=X:\Projecten\Land-use Planning Marowijne\GIS en 
> RS\Werkfolder\GRASS\v.class.mIRR_optional_output\Ben_test_R_script 
> processes=3
> Running R now. Following output is R output.
> Traceback (most recent call last):
>    File "C:\Users\haarlooj\AppData\Roaming\GRASS7\addons/scri
> pts/v.class.mlR.py <http://v.class.mlR.py>", line 633, in <module>
>      main()
>    File "C:\Users\haarlooj\AppData\Roaming\GRASS7\addons/scri
> pts/v.class.mlR.py <http://v.class.mlR.py>", line 570, in main
>      subprocess.check_call(['Rscript', r_commands],
> stderr=subprocess.STDOUT, )

My hunch is that the problem is some PATH issues making it difficult to 
call R.

Maybe some of the Windows gurus out there could help with this ?

Moritz