GenInvMatrix
Advanced Analysis Library Only
AnalysisLibErrType GenInvMatrix (void *inputMatrix, ssize_t matrixSize, int matrixType, void *matrixInverse);
Purpose
Calculates the inverse of the real, square input matrix.
If B denotes the inverse of the matrix A, then
AB = I
where I is the identity matrix
In contrast to InvMatrix, GenInvMatrix allows you to specify the type of the input matrix with the matrixType parameter. The input matrix can be an upper or lower triangular matrix, a general square matrix, or a positive definite matrix. You can save significant computation time if you properly specify the type of the matrix.
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Note If you use this function on an ill-conditioned matrix, the result may be inaccurate due to a loss of precision from arithmetic calculations. The results could also vary between machines because National Instruments uses different optimizations based on processor type. |
Parameters
| Input | ||||||||||||
| Name | Type | Description | ||||||||||
| inputMatrix | void * | Input square matrix. This matrix must be an array of doubles. | ||||||||||
| matrixSize | ssize_t | Number of elements in one dimension of the input matrix. | ||||||||||
| matrixType | int | Type of the matrix. Choose the matrix type correctly because it significantly affects the speed of computation. matrixType must be one of the following values:
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| Output | ||||||||||||
| Name | Type | Description | ||||||||||
| matrixInverse | void * | Calculated inverse matrix, as an array of doubles. | ||||||||||
Return Value
| Name | Type | Description |
| status | AnalysisLibErrType | A value that specifies the type of error that occurred. Refer to analysis.h for definitions of these constants. |
Additional Information
Library: Advanced Analysis Library
Include file: analysis.h
LabWindows/CVI compatibility: LabWindows/CVI 5.0 and later