[pstricks] \psaxes - Offset of first tick from lower left corner & \dataplot clipping

[mogliii]

Hi,

I recently bought the book "PSTricks, 4th edition" (german) by Mr. Voss.

I want to use it to create nice plots of functions and graphs. I already 
got accustomed to the scaling and all the small things. However there 
are still two things I couldn't solve by myself, even though I browsed 
many manuals and examples.

(1) Shift the first x/y - Label/Tick away from the origin by an 
arbitrary distance.

- Example where I would like to use this:
http://www.tug.org/PSTricks/pst-plot/nDiff.pdf

- What I want to do:
I would like to shift the point (0,0) by 0.5 mm to the right, and 0.5 mm 
up. And I also want the Labels to be adjusted accordingly. However, not 
a multiple of the tick distance. Because in that case I could use the 
option "showorigin=false" and "Ox= -1".

To Illustrate, I uploaded a graph where this was done (with Origin) to 
http://www.informatik.uni-freiburg.de/~schmidma/graph.png

Can anyone tell me how to do this with pstricks? Is it necessary to draw 
your own ticks and labels with multido?


(2) Clip data in \dataplot
I want to plot datapoints, but only a small area of it. So some of the 
points are outside the graph. I did not find a easy option. And I dont 
want to filter the data before importing. Because I will have to repeat 
all steps if I change the plot area, and I have to insert dummy-points 
on the border to get the right slope of lines going out of the plot.


Besides these two points I am very impressed by the look of the 
generated graphs. I really like it, especially the exact control on 
arrows, lines and labels (compared to Origin).

With kind regards,
Marek