Some Jottings Related to MATLAB
Manipulating Arrays
reshape
shiftdim
shiftdim allows one to do generalised tranposition. If A is a matrix then shiftdim(A,1) is equal to A'. In fact the 1 can be any odd number; since transposition is of order 2 an even number will leave A unchanged.
>> A=reshape(1:12,3,4)
A =
1 4 7 10
2 5 8 11
3 6 9 12
>> shiftdim(A,3)
ans =
1 2 3
4 5 6
7 8 9
10 11 12
>> shiftdim(A,6)
ans =
1 4 7 10
2 5 8 11
3 6 9 12
circshift
Useful links
http://www-h.eng.cam.ac.uk/help/tpl/programs/Matlab/faster_scripts.html
http://www-h.eng.cam.ac.uk/help/tpl/programs/Matlab/tricks.htm