Graph.mp annoyances

Hi all,

I am using the metapost graph macro a lot, but it has a few minor 
annoyances. Maybe some of you have already solved the following problems:

* The direction of arrowheads in gdrawarrow does not follow the curve it 
is on.

* Reading data from a file only works if there is exactly one empty line 
between data for each curve and the error message is not helpful

* Data with exponent as 1e4 cannot have a capital E.

* Curves from data are always polygonal, unless one changes the true 
argument to GMcvi_ in Gdraw_. If this is set to false a very special 
kind of curve is created. Why does the branch for false have post- and 
precontrol of the curve, not just .. which makes a nice, smooth curve?

* Axes can only be in the llft of the graph, not through the origin.

* Frames can only be avoided if the internal variable  Gneedfr_  is set 
to false. An empty argument to frame would be nice.

I am very interested in any remedies to these issues.

regards,
-- 
Brian Elmegaard ([email protected])
Dept. of Mechanical Engineering, Energy Engineering,
Technical University of Denmark, Phone +45 4525 4169  Fax +45 4593 5215
http://www.et.dtu.dk/staff/be