import * as tf from '../backend/adapter';
export interface SparseMatrix {
    rows: number;
    cols: number;
    indptr: Int32Array;
    indices: Int32Array;
    data: Float64Array;
}
interface SparseMatrixStats {
    shape: [number, number];
    nnz: number;
    min: number;
    max: number;
    mean: number;
}
export declare function sparse_matrix_from_row_maps(rows: Array<Map<number, number>>, cols?: number): SparseMatrix;
export declare function sparse_to_dense_array(matrix: SparseMatrix): number[][];
export declare function sparse_to_dense_tensor(matrix: SparseMatrix): tf.Tensor2D;
export declare function sparse_row_sums(matrix: SparseMatrix, ignore_diagonal?: boolean): Float64Array;
export declare function sparse_stats(matrix: SparseMatrix): SparseMatrixStats;
export {};
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