axescoord2figurecoo​rd

Transform axes coordinates in current figure units coordinate.

Transform axes coordinates in current
figure units coordinate. Useful for annotation location.

Acknowledgments are due to Scott Hirsch ([e-mail]) for is
function ds2nfu. Some part of the present function derived from ds2nfu.

The advantage of the present function comparing to ds2nfu is that it managed problems occurring with various 'DataAspectRatioMode' and 'PlotBoxAspectRatioMode' as well as reverse 'XDir' or 'YDir'.