113 lines
3.6 KiB
Plaintext
113 lines
3.6 KiB
Plaintext
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{{alias}}( shape, strides, offset, order, idx, mode )
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Converts a linear index to an array of subscripts.
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When provided a stride array containing negative strides, if an `offset` is
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greater than `0`, the function interprets the linear index as an index into
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the underlying data buffer for the array, thus returning subscripts from the
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perspective of that buffer. If an `offset` is equal to `0`, the function
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treats the linear index as an index into an array view, thus returning
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subscripts from the perspective of that view. In short, from the perspective
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of a view, view data is always ordered.
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Parameters
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----------
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shape: ArrayLike
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Array shape.
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strides: ArrayLike
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Stride array.
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offset: integer
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Location of the first indexed value based on the stride array.
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order: string
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Specifies whether an array is row-major (C-style) or column-major
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(Fortran-style).
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idx: integer
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Linear index.
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mode: string
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Specifies how to handle a linear index which exceeds array dimensions.
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If equal to 'throw', the function throws an error when a linear index
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exceeds array dimensions. If equal to 'wrap', the function wraps around
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a linear index exceeding array dimensions using modulo arithmetic. If
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equal to 'clamp', the function sets a linear index exceeding array
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dimensions to either `0` (minimum linear index) or the maximum linear
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index. Default: 'throw'.
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Returns
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-------
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out: Array
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Subscripts.
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Examples
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--------
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> var d = [ 3, 3, 3 ];
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> var s = [ 9, 3, 1 ];
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> var out = {{alias}}( d, s, 0, 'row-major', 17, 'throw' )
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[ 1, 2, 2 ]
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{{alias}}.assign( shape, strides, offset, order, idx, mode, out )
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Converts a linear index to an array of subscripts and assigns results to a
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provided output array.
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When provided a stride array containing negative strides, if an `offset` is
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greater than `0`, the function interprets the linear index as an index into
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the underlying data buffer for the array, thus returning subscripts from the
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perspective of that buffer. If an `offset` is equal to `0`, the function
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treats the linear index as an index into an array view, thus returning
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subscripts from the perspective of that view. In short, from the perspective
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of a view, view data is always ordered.
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Parameters
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----------
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shape: ArrayLike
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Array shape.
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strides: ArrayLike
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Stride array.
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offset: integer
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Location of the first indexed value based on the stride array.
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order: string
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Specifies whether an array is row-major (C-style) or column-major
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(Fortran-style).
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idx: integer
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Linear index.
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mode: string
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Specifies how to handle a linear index which exceeds array dimensions.
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If equal to 'throw', the function throws an error when a linear index
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exceeds array dimensions. If equal to 'wrap', the function wraps around
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a linear index exceeding array dimensions using modulo arithmetic. If
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equal to 'clamp', the function sets a linear index exceeding array
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dimensions to either `0` (minimum linear index) or the maximum linear
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index. Default: 'throw'.
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out: Array|TypedArray|Object
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Output object.
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Returns
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-------
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out: Array|TypedArray|Object
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Subscripts.
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Examples
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--------
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> var d = [ 3, 3, 3 ];
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> var s = [ 9, 3, 1 ];
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> var out = [ 0, 0, 0 ];
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> var sub = {{alias}}.assign( d, s, 0, 'row-major', 17, 'throw', out )
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[ 1, 2, 2 ]
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> var bool = ( sub === out )
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true
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See Also
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--------
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