shaped-mean ( array axes keepdims? -- result )
NumPy-style shaped-array operations

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Vocabulary
arrays.shaped

Inputs

array	a shaped-array, a sequence, or a number
axes	an integer, a sequence, or f
keepdims?	a boolean

Outputs

result

a shaped-array

Word description
Computes the arithmetic mean using the axis and result-shape rules of shaped-sum, dividing by a floating-point element count. Empty means are NaN. Unlike NumPy, this word does not emit a runtime warning for empty means.

Definition

USING: arrays.shaped.private kernel math ;

IN: arrays.shaped

: shaped-mean ( array axes keepdims? -- result )
    0 [ + ] reduce-shaped dup zero?
    [ drop [ drop 0/0. ] shaped-map ]
    [ >float '[ _ / ] shaped-map ] if ;