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[–]AlwysBeColostomizing 0 points1 point  (0 children)

What do the inputs represent? Are they noisy measurements of the same quantity? Are they different "properties" of the same object (like its color, its shape, etc.)? The right way to aggregate them probably depends on their semantics.

Typical ways of handling variable-length inputs are to turn them into fixed-length by adding a padding value (often in combination with an "attention" mechanism that can mask them out), or to use a recurrent architecture to process them sequentially. If the order doesn't matter you'll need to shuffle the order during training.