Index.
argmax
Return a maximum argument indexer.
Examples
>>> psidx = ps.Index([10, 9, 8, 7, 100, 5, 4, 3, 100, 3]) >>> psidx Int64Index([10, 9, 8, 7, 100, 5, 4, 3, 100, 3], dtype='int64')
>>> psidx.argmax() 4
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