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Feature Request: Batch validation with optional fold numbers
I have a simple feature request if possible could be added in the cross-validation operator. Currently, we have a "Batch Validation" option that helps to set different batches and divides folds based on the number of batches. I am looking for an enhancement that helps control the number of folds created using these batches.
For example, if I have data related to 100 subjects and each subject has 10 samples, there will be 1000 samples of data. If I need to do a Leave Once subject out Cross-validation, I need to set 100 batch ID's (one for each subject) and do a batch validation in Cross-validation operator. If I need to try only 5 batches where 20 students belong to each batch, I need to generate attribute again with 5 batch ids, instead of this, we can provide an option where it uses the 100 batch ID's created first as an index and divide the 5 subsets based on that.
This will help switch between Leave one batch out and groupKfold validations.
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