Third flattening of ellipse from eccentricity
Support for nonscalar input, including the syntax n
= ecc2n(ellipsoid), will be removed in a future release.
n = ecc2n(ecc)
n = ecc2n(ellipsoid)
n = ecc2n(ecc) computes
the parameter n (the "third flattening") of an
ellipse (or ellipsoid of revolution) given its eccentricity ecc. n is
defined as (a-b)/(a+b),
where a is the semimajor axis and b is
the semiminor axis. Except when the input has 2 columns (or is a row
vector), each element is assumed to be an eccentricity and the output n has
the same size as ecc.
n = ecc2n(ellipsoid), where ellipsoid has
two columns (or is a row vector), assumes that the eccentricity is
in the second column, and a column vector is returned.