Use specific raster/vector file as validation file
From the doc (http://osr-cesbio.ups-tlse.fr/echangeswww/TheiaOSO/iota2_documentation/master/iota2_samples_management.html?highlight=ground%20truth), the ground thruth provided by the end-user is split per defaut, one part being used for the traning and the remaining part for validation.
Is it possible to provide a specific validation file (vector or raster) to have a better control on the validation samples for the computation of the confusion matrix ?