simple-squiggle/node_modules/mathjs/docs/reference/functions/rotate.md

Function rotate

Rotate a vector of size 1x2 counter-clockwise by a given angle Rotate a vector of size 1x3 counter-clockwise by a given angle around the given axis

Syntax

math.rotate(w, theta)
math.rotate(w, theta, v)

Parameters

Parameter	Type	Description
w	Array | Matrix	Vector to rotate
theta	number | BigNumber | Complex | Unit	Rotation angle
v	Array | Matrix	Rotation axis

Returns

Type	Description
Array | Matrix	Multiplication of the rotation matrix and w

Throws

Type	Description

Examples

math.rotate([11, 12], math.pi / 2)                           // returns matrix([-12, 11])
math.rotate(matrix([11, 12]), math.pi / 2)                   // returns matrix([-12, 11])

math.rotate([1, 0, 0], unit('90deg'), [0, 0, 1])             // returns matrix([0, 1, 0])
math.rotate(matrix([1, 0, 0]), unit('90deg'), [0, 0, 1])     // returns matrix([0, 1, 0])

math.rotate([1, 0], math.complex(1 + i))                     // returns matrix([cos(1 + i) - sin(1 + i), sin(1 + i) + cos(1 + i)])

See also

matrix, rotationMatrix