The key function is '%%' (remainder), but its result needs to be
tweaked at mulitplies of 360 because Matlab's definition of wrapTo360
is
lonWrapped = wrapTo360(lon) wraps angles in lon, in degrees, to the
interval [0 360] such that 0 maps to 0 and 360 maps to 360. (In
general, positive multiples of 360 map to 360 and negative multiples
of 360 map to zero.)
wrapTo360 <- function (lon)
{
ret <- lon%%360
ret[lon >= 360 & ret == 0] <- 360
ret
}
As in:
> wrapTo360(c(-721,-720,-719,-361,-360,-359,-1,0,1,359,360,361,720,721))
[1] 359 0 1 359 0 1 359 0 1 359 360 1 360 1
Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Mon, Feb 13, 2017 at 8:44 AM, Peter Mills <peter.mi...@strath.ac.uk> wrote:
> Hi
>
> Is there an equivalent for R of the Matlab function wrapTo360?
>
> Many thanks
> Peter
>
>
> [[alternative HTML version deleted]]
>
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