Nothing
aitoff = function(l,b) {
radeg = 180/pi
sa = l
x180 = which (sa>180.0)
sa[x180] = sa[x180] - 360.
alpha2 = sa/(2*radeg)
delta = b/radeg
r2 = sqrt(2)
f = 2*r2/pi
cdec = cos(delta)
denom =sqrt(1. + cdec*cos(alpha2))
x = cdec*sin(alpha2)*2.*r2/denom
y = sin(delta)*r2/denom
x = x*radeg/f
y = y*radeg/f
return (list(x=x,y=y))
}
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