def content_delta(self, other):
        if other is self:
            return [self.cols()]*self.rows()
        return self.content()
Returns an F-statistic given the following:
dataset/ETHPy150Open AnyMesh/anyMesh-Python/example/urwid/canvas.py/TextCanvas.content_delta--crossover with--dataset/ETHPy150Open radlab/sparrow/src/main/python/third_party/stats.py/lF_value