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CRYSTALS manual
University of Oxford

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# Crystals Manual

## Chapter 11: Matrix Calculations

11.1: The Basic Matrix Calculator \MATRIX

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### 11.1: The Basic Matrix Calculator \MATRIX

```  \MATRIX
A
B
MM
TM
MT
TT
TRANS
INV
EIG
ACC2A
ACC2B
EXECUTE
END

\MATRIX
A 1 2 3 4 5 6 7 8 9
B 4 5 6 7 8 9 10 11 12
MM
END

```

CRYSTALS contains a simple calculator for processing 3x3 matrices. Two matrices, A and B, can be input and operated on. The result is output to the screen and left in an accumulator. It can be transfered to A or B for further operations. There is currently no interface to any stored crystallographic information.

\MATRIX

A

Followed by the nine values for the matrix A by rows

B

Followed by the nine values for the matrix B by rows

MM

Accumulator = AxB

TM

Accumulator = A'xB

MT

Accumulator = AxB'

TT

Accumulator = A'xB'

TRANS

Accumulator = A'

INV

Accumulator = A-1

EIG

Accumulator = Eigenvectors of A

ACC2A

Matrix A = Accumulator

ACC2B

Matrix B = Accumulator

EXECUTE

Forces execution of the last directive

[Introduction To The System | Definitions And Conventions | The Crystals Database | Initial Data Input | Reflection Data Input | Atomic And Structural Parameters | Structure Factors And Least Squares | Fourier Routines | Analysis Of Results | Twinned Crystals | Matrix Calculations | Obsolete Commands ]

© Copyright Chemical Crystallography Laboratory, Oxford, 2006. Comments or queries to David Watkin - david.watkin@chem.ox.ac.uk Telephone +44 1865 285019. This page last changed on Wednesday 8 November 2006. The website was re-generated on Wednesday 8 November 2006. Choose your nearest mirror for faster access: [ Original | CCP14 UK Mirror | CCP14 Canadian Mirror | CCP14 USA Mirror | CCP14 Australian Mirror ]
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