# init(rowCount:columnCount:columnStarts:rowIndices:attributes:blockSize:) ``` init(rowCount: Int32, columnCount: Int32, columnStarts: UnsafeMutablePointer, rowIndices: UnsafeMutablePointer, attributes: SparseAttributesComplex_t, blockSize: UInt8) ``` --- 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)