guyrot | R Documentation |
This function shifts (or rotates) the elements of the input vector in a cyclic fashion (end periodicity is used).
guyrot(v, n)
v |
Vector whose elements you wish to rotate |
n |
Integer determining the amount to rotate, can be negative |
A very simple function which cyclically shifts the elements of a vector. Not necessarily intended as a top level user function but it is a useful little function.
A vector containing the shifted or rotated coefficients.
G P Nason
wpst2discr
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wpstCLASS
# # Start off with an example vector # v <- c(1,2,3,4,5,6) # # Rotate it one element to the right, rightmost element gets rotated round # to be first element. # guyrot(v,1) # [1] 6 1 2 3 4 5 # # Rotate v two spaces to the left, leftmost two elements get rotated around # to be new last elements guyrot(v, -2) # # [1] 3 4 5 6 1 2 # # # Now issue a larger rotation, e.g. 19! # guyrot(v,19) # [1] 6 1 2 3 4 5 # # Its just the same as rotating by 1 since the input vector is of length 6 # and so rotating by 19 is the same as rotating by 6,6,6, and then 1! #
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