The gTruth variable in the gTruthTraining.mat file is a groundTruth object, as described in the documentation available at:
However, the gTruth variable in the attached gTruthTraining.mat file appears to be of the groundTruthMultisignal type. The selectLabels object function is specifically designed for the groundTruth object. For future compatibility, it is advisable to use selectLabelsByGroup, selectLabelsByType, and selectLabelsByName, as selectLabels will be deprecated.
These functions can be explored further in the documentation with the following command:
web(fullfile(docroot, 'vision/ref/groundtruth.html#d123e114966'))
To select multisignal ground truth by label name from a groundTruthMultisignal object, the selectLabelsByLabelName function should be used. Additional details can be found with:
web(fullfile(docroot, 'driving/ref/groundtruthmultisignal.selectlabelsbylabelname.html'))
