IMSL_INV

The IMSL_INV function computes the inverse of a real or complex, square matrix.

Note: This routine requires an IDL Analyst license. For more information, contact your Exelis VIS sales or technical support representative.

Example

Compute the incomplete beta function for the corresponding elements of A, B, and Z.

RM, a, 3, 3

; Define the matrix to be inverted.

row 0: 1 3 3

row 1: 1 3 4

row 2: 1 4 4

ainv = IMSL_INV(a)

; Call IMSL_INV to perform the inversion.

PM, a

; Output the original matrix.

1.00000 3.00000 3.00000

1.00000 3.00000 4.00000

1.00000 4.00000 4.00000

PM, ainv

; Output the computed inverse.

4.00000 -0.00000 -3.00000

0.00000 -1.00000 1.00000

-1.00000 1.00000 0.00000

PM, a # ainv

; Check the results.

1.00000 0.00000 0.00000

0.00000 1.00000 0.00000

0.00000 0.00000 1.00000

Syntax

Result =IMSL_INV( A, [, /DOUBLE] )

Return Value

A two-dimensional matrix containing the inverse of the matrix A.

Arguments

A

Two-dimensional matrix containing the matrix to be inverted.

Keywords

DOUBLE

If present and nonzero, double precision is used.

Errors

Fatal Errors

MATH_SINGULAR_MATRIX - Input matrix is singular

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