Packed arrays

5 built-in function(s) in this category.

• FromNDArray — FromNDArray[expr] returns expr with any dense buffer storage undone: a packed List becomes an ordinary List of separate elements, and an NDArray[...] becomes the nested List of its entries. Anything else is returned unchanged. Inverse of ToNDArray. (Stable)
• FromPackedArray — FromPackedArray[expr] is FromNDArray[expr]: it returns expr with any dense buffer storage undone, so a packed List becomes an ordinary List of separate elements and an NDArray[...] becomes the nested List of its entries. Provided under Mathematica's name for the same operation; see FromNDArray. (Stable)
• PackedArrayQ — PackedArrayQ[expr] (Stable)
• ToNDArray — ToNDArray[list] returns list stored as a dense machine-precision buffer. The result is still a List -- same Head, same printed form, same elements -- but NDArrayQ gives True for it. ToNDArray[list, DataType -> "float64"] forces the element type. A mix of Integer and Real machine values is widened to a Real buffer (the integers become doubles); an all-Integer list stays Integer. Returns list unchanged when it is not rectangular, is empty, or holds any non-machine value. Unlike automatic packing it ignores the size threshold. (Stable)
• ToPackedArray — ToPackedArray[list] is ToNDArray[list]: it returns list stored as a dense machine-precision buffer. The result is still a List -- same Head, same printed form, same elements -- but NDArrayQ gives True for it. Provided under Mathematica's name for the same operation; see ToNDArray. (Stable)