@thi.ng/tensors/integrate.d.ts

0D/1D/2D/3D/4D tensors with extensible polymorphic operations and customizable storage

import type { Fn } from "@thi.ng/api";
import type { ITensor } from "./api.js";
import { Tensor1 } from "./tensor.js";
/**
 * Integrates given tensor along innermost dimension and writes result to 1D
 * tensor `out` (or creates new one).
 *
 * @remarks
 * The output tensor shape must match the innermost shape of the input: e.g. if
 * input shape is `[2,3,4]`, then the output tensor must have a shape of `[4]`.
 *
 * @example
 * ```ts tangle:../export/integrate.ts
 * import { integrate, print, product, sum, tensor } from "@thi.ng/tensors";
 *
 * const input = tensor([[1, 2], [10, 20], [100, 200]]);
 *
 * // integrate using `sum()` (also default)
 * // i.e. [1 + 10 + 100, 2 + 20 + 200]
 * print(integrate(null, input, sum));
 * //  111.0000  222.0000
 *
 * // integrate using `product()`
 * // i.e. [1 * 10 * 100, 2 * 20 * 200]
 * print(integrate(null, input, product));
 * // 1000.0000 8000.0000
 * ```
 *
 * @param out
 * @param a
 * @param fn
 */
export declare const integrate: (out: Tensor1 | null, a: ITensor, fn?: Fn<ITensor, number>) => Tensor1;
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