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	[[Reduction]] and the related operators [[Scan]] and [[Windowed Reduction]] reduce along 1-dimensional subarrays of the right argument. The vectors used in a particular reduction can be formed by taking a scalar index along each axis except the reduction axis, and selecting from the reduction axis according to the operator used. For a reduction the entire axis is used while for scans [[prefix]]es are used and windowed reductions take subsections of the length specified by the left argument.		[[Reduction]] and the related operators [[Scan]] and [[Windowed Reduction]] reduce along 1-dimensional subarrays of the right argument. The vectors used in a particular reduction can be formed by taking a scalar index along each axis except the reduction axis, and selecting from the reduction axis according to the operator used. For a reduction the entire axis is used while for scans [[prefix]]es are used and windowed reductions take subsections of the length specified by the left argument.

	{{APL ~~programming language~~}}		{{APL features}}