meshgrid

Creates a pair of 2D coordinate matrices from two 1D coordinate vectors. Useful for evaluating functions on a grid or creating plotting meshes.

Signature

fun <T : Number> Multik.meshgrid(
    x: MultiArray<T, D1>,
    y: MultiArray<T, D1>
): Pair<D2Array<T>, D2Array<T>>

Parameters

Parameter	Type	Description
`x`	`MultiArray<T, D1>`	1D array of x-coordinates.
`y`	`MultiArray<T, D1>`	1D array of y-coordinates.

Returns: Pair<D2Array<T>, D2Array<T>> — two matrices (X, Y) where:

X has shape (y.size, x.size) — each row is a copy of x.
Y has shape (y.size, x.size) — each column is a copy of y.

Example

val x = mk.ndarray(mk[1, 2, 3])
val y = mk.ndarray(mk[4, 5])

val (X, Y) = mk.meshgrid(x, y)

// X:
// [[1, 2, 3],
//  [1, 2, 3]]

// Y:
// [[4, 4, 4],
//  [5, 5, 5]]

This is useful for evaluating functions on a grid:

val x = mk.linspace<Double>(0.0, 1.0, 10)
val y = mk.linspace<Double>(0.0, 1.0, 10)
val (X, Y) = mk.meshgrid(x, y)
// Compute f(x, y) = x^2 + y^2 element-wise on the grid

28 February 2026