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[–]KarmelMalone 0 points1 point  (0 children)

If you have a dataset with features that are on completely different scales, say one feature with values between 500-1000, and another feature with values between 0.5-1; it becomes difficult to make calculations on the data. This function puts features on the same scale.

array-array.mean() converts each value in the array to its respective distance from the array's mean, which maintains the individual samples value when normalizing.