Finding eccentricity of plotted ellipse in matlab

Finding eccentricity of plotted ellipse in matlab

I am new to matlab, so this might be a trivial question. But I couldn't
find any help googling, regarding this. I have a set of points, and from
that I have found a minimum bounding ellipse, enclosing those points. The
function returns the center of the ellipse, and a matrix A (in center
form). I need to find eccentricity of the ellipse, along with properties
like semi-axes lengths of the same ellipse.
And some pointers as to what exactly A contains, is also appreciated.
Thanks a lot.