[pstricks] tangential vector

Michael Sharpe msharpe at ucsd.edu
Wed Apr 8 18:59:44 CEST 2009

On Apr 8, 2009, at 8:45 AM, Doris Wagner wrote:

> hi list,
> I have a graph which shows a trajectory (e.g. polynomial) of a
> physical object and I want to draw the tangent vector. the problem
> with \psplotTangent is that it goes in two directions from one point
> of the graph. is there a possibility to get only half of it?
> d

I don't know if this is possible with \psplotTangent, but you can  
accomplish the same thing another way. I wrote a package pst- 
nodeExtras with an example showing how do do this. Take a look at the  
documentation, looking for \psxline and \curvepnode.


To use, download and place in a location searched by TeX


Then \usepackage{pst-nodeExtras}


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