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How to split any sizeable dataset into Training, Validation and Test sub-datasets using Spotfire

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Just an arbitraryexample here... let's say I would like to splitthe Red Wine Quality dataset (https://www.kaggle.com/uciml/red-wine-quality-cortez-et-al-2009) into 3 datasets of 75%, 20% and 5% ratios for the purposes of Training, Validation and Testing of my model.


What are the different methods of achieving this in Spotfire I would like to purely rely on Spotfire without any R codes involved.


p.s I am not exactly using the Red Wine Quality dataset as mentioned above but my current dataset has similar number of variables and observations.

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