[pstricks] Automate a line drawing routine

[Juergen Gilg]

Dear Arnold,

where should appear the arrowheads, if the line ends in: (-5,-5), 
(-5,5), (5,-5), (-5,5)  in the 4 CORNERS of your grid???
Inmidst of the circlepoint = not visible, due to the radius of the circle...

Just a general question: Why do you like to have arrowheads in a 
functionplot? Any didactial aspects? I am definitely not used to that. 
To show that the line does not end at that point?

I always imagine when having an arrowhead, that there is a DIRECTION... 
Just to widen my horizon of didactics.

Regard,

Juergen


David Arnold wrote:
> Jurgen,
>
> Good ideas here. I would not thought of this solution.
>
> One point: At my end, the lines don't have arrows at each end. They're 
> line segments.
>
> Is there a fix for this?
>
> D.
>
>
> ------------------------------------------------------------------------
>
>
> On Dec 29, 2008, at 11:55 AM, Juergen Gilg wrote:
>
>> Dear David,
>>
>> couldn't solve the problem with 2 arrowhead at the end of the lines 
>> drawn, however the rest should work fine.
>>> Looking for ideas.
>>>   
>> \documentclass{article}
>> \usepackage{pstricks,pstricks-add}
>> \begin{document}
>> \pagestyle{empty}
>>
>> \newcommand{\DaveArnold}[4]{%
>> \psset{unit=0.5}
>> \begin{pspicture}(-6,-6)(6,6)
>> \psgrid[gridcolor=lightgray,gridlabels=0pt,subgriddiv=1](0,0)(-5,-5)(5,5)
>> \psaxes[labels=none,ticks=none]{->}(0,0)(-5.5,-5.5)(5.5,5.5)
>> \Cnode[radius=0.1cm,fillstyle=solid,fillcolor=blue,linecolor=blue](#1,#2){A}
>> \Cnode[radius=0.1cm,fillstyle=solid,fillcolor=blue,linecolor=blue](#3,#4){B}
>> \psclip{\psframe[linestyle=none](-5,-5)(5,5)}
>> \ncline[nodesep=10cm,linecolor=blue]{<->}{A}{B}
>> \endpsclip
>> \uput[0](5.5,0){$x$}
>> \uput[90](0,5.5){$y$}
>> \end{pspicture}
>> \resetOptions
>> }
>>
>> \DaveArnold{1}{2}{-3}{5}
>> %First Argument     x-Koordinate Point A
>> %Second Argument    y-Koordinate Point A
>> %Third Argument     x-Koordinate Point B
>> %Fourth Argument    y-Koordinate Point B
>>
>> \DaveArnold{-1}{-2}{3}{3}
>>
>> \DaveArnold{-5}{-5}{1}{2}
>>
>> %NO PROBLEM to so produce vertical and horizontal lines as well.
>> \end{document} 
>>     
>>
>> Regards,
>>
>> Juergen
>> _______________________________________________
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>
> ------------------------------------------------------------------------
>
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-- 
 Jürgen Gilg
 Austr. 59
 70376 Stuttgart
-------------------------------------
 Tel       0711.59 27 88
 e-Mail    gilg at acrotex.net
 Websites  www.acrotex.net
           www.brueckenkurs-physik.de
           www.gilligan-online.de

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