Hi Hans,

You can use the reverse flag of the axis, see 
http://pyx.sourceforge.net/manual/axis.html#graph.axis.axis.linear, or fix the 
axis range manually and set max to be smaller than min (which sounds a little 
crazy, but it perfectly does the trick as well).

HTH, André

Am 11.05.2013 um 21:55 schrieb Hans L:

> Hello, I am new to using PyX and was wondering if it is possible to invert 
> the Y axis so the top left of page is 0,0 and the y value increases as you go 
> towards the bottom of the page?  
> 
> I experimented with passing a trafo to the canvas constructor:
> trafo.trafo(matrix=((1, 0), (0, -1)), vector=(0, canvasheight))
> 
> This seems to work ok for graphics, but then of course all text is upside 
> down.  
> I tried applying a similar y flipping transformation to the textattrs to 
> upright it again, but it did not seem to do anything.
> 
> Is there any simple solution to this?
> 
> Thanks,
> Hans
> 
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Learn Graph Databases - Download FREE O'Reilly Book
"Graph Databases" is the definitive new guide to graph databases and 
their applications. This 200-page book is written by three acclaimed 
leaders in the field. The early access version is available now. 
Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
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