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eul2rotm

Convert Euler angles to rotation matrix

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Syntax

rotm = eul2rotm(eul)
rotm = eul2rotm(eul,sequence)

Description

rotm = eul2rotm(eul) converts a set of Euler angles, eul, to the corresponding rotation matrix, rotm. When using the rotation matrix, premultiply it with the coordinates to be rotated (as opposed to postmultiplying). The default order for Euler angle rotations is "ZYX".

example

rotm = eul2rotm(eul,sequence) converts Euler angles to a rotation matrix, rotm. The Euler angles are specified in the axis rotation sequence, sequence. The default order for Euler angle rotations is "ZYX".

example

Examples

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Open Live Script
eul = [0 pi/2 0];
rotmZYX = eul2rotm(eul)
rotmZYX = 3×3

    0.0000         0    1.0000
         0    1.0000         0
   -1.0000         0    0.0000
Open Live Script
eul = [0 pi/2 pi/2];
rotmZYZ = eul2rotm(eul,'ZYZ')
rotmZYZ = 3×3

    0.0000   -0.0000    1.0000
    1.0000    0.0000         0
   -0.0000    1.0000    0.0000

Input Arguments

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Euler rotation angles in radians, specified as an n-by-3 array of intrinsic Euler rotation angles. Each row represents one Euler angle set in the sequence defined by the sequence argument. For example, with the default sequence "ZYX", each row of eul is of the form [zAngle yAngle xAngle].

Example: [0 0 1.5708]

Axis-rotation sequence for the Euler angles, specified as one of these string scalars:

  • "ZYX" (default)

  • "ZYZ"

  • "ZXY"

  • "ZXZ"

  • "YXY"

  • "YZX"

  • "YXZ"

  • "YZY"

  • "XYX"

  • "XYZ"

  • "XZX"

  • "XZY"

Each character indicates the corresponding axis. For example, if the sequence is "ZYX", then the three specified Euler angles are interpreted in order as a rotation around the z-axis, a rotation around the y-axis, and a rotation around the x-axis. When applying this rotation to a point, it will apply the axis rotations in the order x, then y, then z.

Data Types: string | char

Output Arguments

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Rotation matrix, returned as a 3-by-3-by-n matrix containing n rotation matrices. Each rotation matrix has a size of 3-by-3 and is orthonormal. When using the rotation matrix, premultiply it with the coordinates to be rotated (as opposed to postmultiplying).

Example: [0 0 1; 0 1 0; -1 0 0]

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Version History

Introduced in R2015a

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See Also

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