function vectorfun
vectorfun<T>(
dim: 0 | 1,
fun: (vector: array) => T,
): T | T[]

Applies a function to each vector column or row of a matrix.

This function applies a given function to each vector (column or row) of a matrix based on the specified dimension. For arrays: applies function directly and returns the result. For matrices: applies function to each row/column and returns array of results.

Examples

Apply function along rows of a matrix

import { assertEquals } from "jsr:@std/assert";

const mean = (a: number[]): number => a.reduce((sum, num) => sum + num, 0) / a.length;
assertEquals(vectorfun(0, [[5, 6, 5], [7, 8, -1]], mean), [5.333333333333333, 4.666666666666667]);

Apply function along columns of a matrix

import { assertEquals } from "jsr:@std/assert";

const mean = (a: number[]): number => a.reduce((sum, num) => sum + num, 0) / a.length;

assertEquals(vectorfun(1, [[5, 6, 5], [7, 8, -1]], mean), [6, 7, 2]);

Applying function on a single array

import { assertEquals } from "jsr:@std/assert";

const sum = (arr: number[]): number => arr.reduce((sum, num) => sum + num, 0);
assertEquals(vectorfun(0, [1, 2, 3, 4], sum), 10);

Apply function without additional arguments

import { assertEquals } from "jsr:@std/assert";

const max = (arr: number[]): number => Math.max(...arr);
assertEquals(vectorfun(0, [[1, 3, 5], [2, 4, 6]], max), [5, 6]);

Apply function on an empty array

import { assertEquals } from "jsr:@std/assert";

const max = (arr: number[]): number => Math.max(...arr);

const result = vectorfun(0, [] as number[], max);
assertEquals(result, []);

Type Parameters

Parameters

dim: 0 | 1
fun: (vector: array) => T

Return Type

T | T[]
vectorfun<
T,
A1,
>(
dim: 0 | 1,
fun: (
vector: array,
arg1: A1,
) => T,
arg1: A1,
): T | T[]

Applies a function to each vector column or row of a matrix.

This function applies a given function to each vector (column or row) of a matrix based on the specified dimension. For arrays: applies function directly and returns the result. For matrices: applies function to each row/column and returns array of results.

Examples

Apply function along rows of a matrix

import { assertEquals } from "jsr:@std/assert";

const mean = (a: number[]): number => a.reduce((sum, num) => sum + num, 0) / a.length;
assertEquals(vectorfun(0, [[5, 6, 5], [7, 8, -1]], mean), [5.333333333333333, 4.666666666666667]);

Apply function along columns of a matrix

import { assertEquals } from "jsr:@std/assert";

const mean = (a: number[]): number => a.reduce((sum, num) => sum + num, 0) / a.length;

assertEquals(vectorfun(1, [[5, 6, 5], [7, 8, -1]], mean), [6, 7, 2]);

Applying function on a single array

import { assertEquals } from "jsr:@std/assert";

const sum = (arr: number[]): number => arr.reduce((sum, num) => sum + num, 0);
assertEquals(vectorfun(0, [1, 2, 3, 4], sum), 10);

Apply function without additional arguments

import { assertEquals } from "jsr:@std/assert";

const max = (arr: number[]): number => Math.max(...arr);
assertEquals(vectorfun(0, [[1, 3, 5], [2, 4, 6]], max), [5, 6]);

Apply function on an empty array

import { assertEquals } from "jsr:@std/assert";

const max = (arr: number[]): number => Math.max(...arr);

const result = vectorfun(0, [] as number[], max);
assertEquals(result, []);

Type Parameters

A1

Parameters

dim: 0 | 1
fun: (
vector: array,
arg1: A1,
) => T
arg1: A1

Return Type

T | T[]
vectorfun<
T,
A1,
A2,
>(
dim: 0 | 1,
fun: (
vector: array,
arg1: A1,
arg2: A2,
) => T,
arg1: A1,
arg2: A2,
): T | T[]

Applies a function to each vector column or row of a matrix.

This function applies a given function to each vector (column or row) of a matrix based on the specified dimension. For arrays: applies function directly and returns the result. For matrices: applies function to each row/column and returns array of results.

Examples

Apply function along rows of a matrix

import { assertEquals } from "jsr:@std/assert";

const mean = (a: number[]): number => a.reduce((sum, num) => sum + num, 0) / a.length;
assertEquals(vectorfun(0, [[5, 6, 5], [7, 8, -1]], mean), [5.333333333333333, 4.666666666666667]);

Apply function along columns of a matrix

import { assertEquals } from "jsr:@std/assert";

const mean = (a: number[]): number => a.reduce((sum, num) => sum + num, 0) / a.length;

assertEquals(vectorfun(1, [[5, 6, 5], [7, 8, -1]], mean), [6, 7, 2]);

Applying function on a single array

import { assertEquals } from "jsr:@std/assert";

const sum = (arr: number[]): number => arr.reduce((sum, num) => sum + num, 0);
assertEquals(vectorfun(0, [1, 2, 3, 4], sum), 10);

Apply function without additional arguments

import { assertEquals } from "jsr:@std/assert";

const max = (arr: number[]): number => Math.max(...arr);
assertEquals(vectorfun(0, [[1, 3, 5], [2, 4, 6]], max), [5, 6]);

Apply function on an empty array

import { assertEquals } from "jsr:@std/assert";

const max = (arr: number[]): number => Math.max(...arr);

const result = vectorfun(0, [] as number[], max);
assertEquals(result, []);

Type Parameters

A1
A2

Parameters

dim: 0 | 1
fun: (
vector: array,
arg1: A1,
arg2: A2,
) => T
arg1: A1
arg2: A2

Return Type

T | T[]
vectorfun<
T,
A1,
A2,
A3,
>(
dim: 0 | 1,
fun: (
vector: array,
arg1: A1,
arg2: A2,
arg3: A3,
) => T,
arg1: A1,
arg2: A2,
arg3: A3,
): T | T[]

Applies a function to each vector column or row of a matrix.

This function applies a given function to each vector (column or row) of a matrix based on the specified dimension. For arrays: applies function directly and returns the result. For matrices: applies function to each row/column and returns array of results.

Examples

Apply function along rows of a matrix

import { assertEquals } from "jsr:@std/assert";

const mean = (a: number[]): number => a.reduce((sum, num) => sum + num, 0) / a.length;
assertEquals(vectorfun(0, [[5, 6, 5], [7, 8, -1]], mean), [5.333333333333333, 4.666666666666667]);

Apply function along columns of a matrix

import { assertEquals } from "jsr:@std/assert";

const mean = (a: number[]): number => a.reduce((sum, num) => sum + num, 0) / a.length;

assertEquals(vectorfun(1, [[5, 6, 5], [7, 8, -1]], mean), [6, 7, 2]);

Applying function on a single array

import { assertEquals } from "jsr:@std/assert";

const sum = (arr: number[]): number => arr.reduce((sum, num) => sum + num, 0);
assertEquals(vectorfun(0, [1, 2, 3, 4], sum), 10);

Apply function without additional arguments

import { assertEquals } from "jsr:@std/assert";

const max = (arr: number[]): number => Math.max(...arr);
assertEquals(vectorfun(0, [[1, 3, 5], [2, 4, 6]], max), [5, 6]);

Apply function on an empty array

import { assertEquals } from "jsr:@std/assert";

const max = (arr: number[]): number => Math.max(...arr);

const result = vectorfun(0, [] as number[], max);
assertEquals(result, []);

Type Parameters

A1
A2
A3

Parameters

dim: 0 | 1
fun: (
vector: array,
arg1: A1,
arg2: A2,
arg3: A3,
) => T
arg1: A1
arg2: A2
arg3: A3

Return Type

T | T[]

Usage

import vectorfun from "datatype/vectorfun.ts";