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Set not-defeult options

• To: mathgroup at smc.vnet.net
• Subject: [mg60069] Set not-defeult options
• From: Daniele Lupo <danwolf80_no_spam_ at libero.it>
• Date: Thu, 1 Sep 2005 02:13:06 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

Hi.

I've downloaded the CurvesGraphics package from 

http://www.dimi.uniud.it/~gorni/

It adds an options to Plot, that creates arrows that make a curve oriented.

To do this, the package add an option to Plot, and to create the oriented
curve I must to write:

Plot[..., Oriented->True]

Default value is False.

Now, I want to set this option to True using SetOptions:

SetOptions[Plot,Oriented->True] 

after calling the package, but it does not work, because it's not a default
option.

I'd like thi know if there's a way to plot an oriented plot when I write
Plot[...] by default, without defining a new function in this way

ArrowPlot[x__,op___?OptionQ]:=Plot[x__,op,Oriented->True]

I can do it in this way, but I'd like to use Plot instead of ArrowPlot.
How can I do?

Thanks for your answers

Daniele