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INVERT

 

Syntax: @INVERT(M)

M = a square matrix

@INVERT generates the inverse of the matrix M, which must be square. The result matrix is the same size as the argument matrix. Multiplying M times the result matrix produces an identity matrix (a matrix with 1's in the diagonal and 0's elsewhere). A singular matrix can not be inverted and therefore produces an error when passed to @INVERT.

Examples:

Matrix B9..C10 =

B C
9 0 1
10 1 2

@INVERT(B9..C10) =
-2 1
1 2

Matrix A1..B4 =

A B
1 0.99 0
2 3 6.2
3 4.1 1.1
4 3.3 6.3

@INVERT(A1..B4) = Error - @INVERT, matrix must be square

Matrix H8..J10 =

H I J
1 1 1 1
2 3 1 1
3 7 2 6

@INVERT(H8..J10) =

-0.5 0.5 0
1.375 0.125 -0.25
0.125 -0.625 0.25


next up previous contents index
Next: INVFFT Up: A Function Reference Previous: INVDFT

NExS User's Guide, Version 1.4.5
Grey Trout Software
11 April 1999