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how to split a dataset into training and validation set keeping ratio between classes?


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I have a multi class classification problem and my data-set is skewed, I have 100 instances of a particular class which was my project in Machine Learning Course and say 10 of some different class, so I want to split my dataset keeping ratio between classes, if I have 100 instances of a particular class and I want 30% of records to go in the training set I want to have there 30 instances of my 100 record represented class and 3 instances of my 10 record represented class and so on.

Edited by Rohit_bhat
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