# Reference/inv

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Revision as of 18:58, 11 May 2012 by Aaron Davies (Talk | contribs)

## Contents |

## inv (inverse function)

`inv` computes the inverse of a non-singular floating point matrix.

## Syntax

q)r:inv x

## Example

q)a:3 3#2 4 8 3 5 6 0 7 1f q)inv a -0.4512195 0.6341463 -0.195122 -0.03658537 0.02439024 0.1463415 0.2560976 -0.1707317 -0.02439024 q)a mmu inv a 1 -2.664535e-15 5.828671e-16 -2.664535e-15 1 -1.19349e-15 3.885781e-16 -4.163336e-16 1 q)1=a mmu inv a 100b 010b 001b

## See also

For a complete list of functions, see the kdb+ Function Reference.