[Tutor] rotation within arrays

[Alan Gauld]

"Andy Cheesman" <Andy.cheesman at bristol.ac.uk>

> The problem which I have is that I now need to rotated alternative 
> layer
> of the arrays but I still need to have the original mapping i.e 3 -> 
> 12.

Is your problem how to rotate the array?
Or how to preserve the mapping?
or both?

I don't know offhand how to do either but I'm not sure
which I should be thinking about first!

Alan G