*** For details on how to be removed from this list visit the ***
*** CCP4 home page http://www.ccp4.ac.uk ***
> A rather naive question, I'm afraid. I'm trying to determine the inverse
> of a large number of rotation/translation operations for some
> coordinates, each operation represented as a 3x3 matrix and translation vector. I
> understand that if A -> A' by a particular operation, then the rotation
> matrix for A' -> A is the transpose matrix. But what how is the tranlation vector
> of the inverse operation calculated ? It is not simply the reverse
> vector. Also, are there any CCP4 programs which automate this procedure,
> rather than do them all by hand (or specifying INVERT in dm !)
the INvert command in LSQMAN will do just that. put all your operators
(formatted as O datablocks) in one big text file; fire up LSQMAN; do
"INvert infile outfile"; and Bob's the brother of one of your parents
--dvd
******************************************************************
Gerard J. Kleywegt
[Research Fellow of the Royal Swedish Academy of Sciences]
Dept. of Cell & Molecular Biology University of Uppsala
Biomedical Centre Box 596
SE-751 24 Uppsala SWEDEN
http://xray.bmc.uu.se/gerard/ mailto:gerard@xray.bmc.uu.se
******************************************************************
The opinions in this message are fictional. Any similarity
to actual opinions, living or dead, is purely coincidental.
******************************************************************