magic.prime | R Documentation |
Produces magic squares of prime order using the standard method
magic.prime(n,i=2,j=3)
n |
The order of the square |
i |
row number of increment |
j |
column number of increment |
Claimed to work for order any prime p
with (p,ij)=1
, but
I've tried it (with the defaults for i
and j
) for many
composite integers of the form 6n+1
and 6n-1
and
found no exceptions; indeed, they all seem to be panmagic. It is not
clear to me when the process works and when it doesn't.
Robin K. S. Hankin
magic.prime(7)
f <- function(n){is.magic(magic.prime(n))}
all(sapply(6*1:30+1,f))
all(sapply(6*1:30-1,f))
is.magic(magic.prime(9,i=2,j=4),give.answers=TRUE)
magic.prime(7,i=2,j=4)
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