circular right shift of

This function converts a sample sequence to a sample sequence with exactly the same values, in the same order, except that each value has been moved along to the right by one episode, with the right-most value ‘falling off’ the end and being put in the first position.

For example, suppose we had the following case fragment:

              01 Jun 09    20 Jun 09    30 Jun 09    15 Oct 09    02 Nov 09
SectorFrom        SYD         KUL          MAD          LHR          SIN
SectorTo          KUL         MAD          LHR          SIN          SYD

Then the condition

all circular right shift of SectorTo are SectorFrom

is true.