[pstricks] tangential vector

[Juergen Gilg]

Dear Herbert,
> sure, but there is always the problem with too many optional
> arguments which make a macro more complicated.
>
>   
sure, that some more arguments make the macro too complex.
I was thinking eventually of some fine key-value-pair, e.g. 
[xrange=-2..4]. Also possible for \psplot to reduce the number of arguments.

Those key-value-pairs make a complex macro so much more transparent :-)

Regards,

Juergen

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 Jürgen Gilg
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