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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

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