EigenVector(Array, Variable, Variable, Array) Function

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Description

Calculate the eigen vectors of a numRows by numCols matrix rowMajorSymMatrix. The eigen vector is stored in eigenVectors.

 

This function has been Deprecated. Please use Matrix.EigenDecomposition(Matrix,Matrix) instead.

 

Timing Precision Mode

This page describes functionality in millisecond timing precision mode. Millisecond timing precision mode is deprecated and will be removed in a future release. We recommend that you migrate your Mission Plans to nanosecond timing precision mode.

 

Function Signature

EigenVector(

Array rowMajorSymMatrix,

Variable numRows,

Variable numCols,

Array eigenVectors)

 

 

Arguments

rowMajorSymMatrix

Description:

A row-major symmetric matrix.

 

 

numRows

Description:

The number of rows in the matrix.

Valid Range:

numRows > 0

 

 

numCols

Description:

The number of columns in the matrix.

Valid Range:

numCols > 0

 

 

eigenVectors

Description:

The array to store the calculated eigen vectors.

 

 

 

Return Value

Type:

number

 

 

Returns number of unique eigen vectors.

 

Syntax

myVariable1 = EigenVector(myArray1, myVariable2, myVariable3, myArray2);

 

 

Example 1

This example calculates the Eigen vectors of the Spacecraft's attitude. Note: SymmetricMatrix and EigenVecs are 9-element arrays in this example.

 

Array SymmetricMatrix[9];

Array EigenVecs[9];

 

SymmetricMatrix = {Spacecraft1.AttitudeMatrix11,

                  Spacecraft1.AttitudeMatrix12,

                Spacecraft1.AttitudeMatrix13,

                  Spacecraft1.AttitudeMatrix21,

                  Spacecraft1.AttitudeMatrix22,

                  Spacecraft1.AttitudeMatrix23,

                  Spacecraft1.AttitudeMatrix31,

                  Spacecraft1.AttitudeMatrix32,

                  Spacecraft1.AttitudeMatrix33};

 

Variable numEigenVecs = EigenVector(SymmetricMatrix, 3, 3, EigenVecs);

 

Report SymmetricMatrix, numEigenVecs, EigenVecs;

 

 

Output:

 

SymmetricMatrix

{0.239154924, 0.968353162, 0.071393805,

-0.804101914, 0.156301579, 0.573576436,

0.544265592, -0.194581524, 0.816034923}

numEigenVecs

3.000000000

EigenVecs

{-0.636989681, 0.737108187, -0.225645004,

0.572216989, 0.255987245, -0.779126593,

0.516538347, 0.625413505, 0.584847060}

 

 

 

See also

EigenVector