# Sparse Vector Utility Operations Create and work with sparse vector structures. ## Topics ### Sparse Utility Operations [`func sparse_get_vector_nonzero_count_double(sparse_dimension, UnsafePointer!, sparse_stride) -> Int`](/documentation/Accelerate/sparse_get_vector_nonzero_count_double(_:_:_:)) Returns the number of nonzero values in the double-precision dense vector *x*. [`func sparse_get_vector_nonzero_count_float(sparse_dimension, UnsafePointer!, sparse_stride) -> Int`](/documentation/Accelerate/sparse_get_vector_nonzero_count_float(_:_:_:)) Returns the number of nonzero values in the single-precision dense vector *x*. [`func sparse_pack_vector_double(sparse_dimension, sparse_dimension, UnsafePointer!, sparse_stride, UnsafeMutablePointer!, UnsafeMutablePointer!) -> Int`](/documentation/Accelerate/sparse_pack_vector_double(_:_:_:_:_:_:)) Packs nonzero values from a double-precision dense vector to a destination array. [`func sparse_pack_vector_float(sparse_dimension, sparse_dimension, UnsafePointer!, sparse_stride, UnsafeMutablePointer!, UnsafeMutablePointer!) -> Int`](/documentation/Accelerate/sparse_pack_vector_float(_:_:_:_:_:_:)) Packs nonzero values from a single-precision dense vector to a destination array. [`func sparse_unpack_vector_double(sparse_dimension, sparse_dimension, Bool, UnsafePointer!, UnsafePointer!, UnsafeMutablePointer!, sparse_stride)`](/documentation/Accelerate/sparse_unpack_vector_double(_:_:_:_:_:_:_:)) Extracts elements from the sparse vector *x* into the corresponding location in the dense vector *y*, with both vectors containing double-precision values. [`func sparse_unpack_vector_float(sparse_dimension, sparse_dimension, Bool, UnsafePointer!, UnsafePointer!, UnsafeMutablePointer!, sparse_stride)`](/documentation/Accelerate/sparse_unpack_vector_float(_:_:_:_:_:_:_:)) Extracts elements from the sparse vector *x* into the corresponding location in the dense vector *y*, with both vectors containing single-precision values. ### Supporting Types [`typealias sparse_dimension`](/documentation/Accelerate/sparse_dimension) The dimension type. [`typealias sparse_index`](/documentation/Accelerate/sparse_index) The index type. [`typealias sparse_stride`](/documentation/Accelerate/sparse_stride) The stride type. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)