VSHIFT is the jVarfun module of jLab.

  VSHIFT  Cycles the elements of an array along a specified dimension.
    Y=VSHIFT(X,N,DIM) cycles the elements of X N places along dimension DIM.
    Example: x=[1 2 3 4 5];
             vshift(x,+1,2)=[2 3 4 5 1]           
             vshift(x,-1,2)=[5 1 2 3 4]           
    Note shifting by N and then by -N recovers the original array. 
    [Y1,Y2,...YN]=VSHIFT(X1,X2,...XN,N,DIM) also works.
    VSHIFT(X1,X2,...XN,N,DIM); with no arguments overwrite the original 
    input variables.
    Note that VSHIFT is similar to Matlab's CIRCSHIFT, but has the opposite
    convection for positive and negative shifts. 
    Y=VSHIFT(X,N,DIM,INDEX,DIM2) applies this shift selectively, only to
    that subset of X obtained by indexing X with INDEX along DIM2, i.e.
 		    1 2      DIM2     DIMS(X)
 		    | |        |         |
 		  X(:,:, ... INDEX, ..., :)	
    is cycled N places along dimension DIM, but the remainder of X is not. 
    DIM and DIM2 cannot be the same.  The above extensions to multiple 
    output varibles work in this case as well.  
    See also: VINDEX, CIRCSHIFT.
    This is part of JLAB --- type 'help jlab' for more information
    (C) 2001--2016 J.M. Lilly --- type 'help jlab_license' for details

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