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Machine learning algorithms build a model of the training data. The term "machine learning" is vaguely defined; it includes what is also called statistical learning, reinforcement learning, unsupervised learning, etc. ALWAYS ADD A MORE SPECIFIC TAG.

10 votes
2 answers
6k views

In machine learning, Is it better to have class ratios balanced or representative of the pop...

In the context of machine learning, let's say you have a problem in which classes in the real population are not balanced - eg Class A occurs 80% of the time and Class B occurs 20% of the time. In su …
blu's user avatar
  • 533
1 vote
0 answers
41 views

Are there simple memory-efficient ways to do multi-instance learning?

At the moment, I'm simply using mean of the features in all the instances in a bag to represent a given bag. I've also tried using min/max, gmean and hmean, but didn't get any better results. Are t …
blu's user avatar
  • 533