Re: defining "regions"
- To: mathgroup at smc.vnet.net
- Subject: [mg14770] Re: defining "regions"
- From: "M. Rommel" <rommel at bc.edu>
- Date: Sat, 14 Nov 1998 03:08:01 -0500
- Organization: UltraNet Communications , an RCN Company http://www.ultranet.com/
- References: <72588n$8an@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
I am sure it is not the most beautiful solution (it reflects my current
level of expertise):
In[18]:= pts={{1,2},{3,4},{1,5}}; In[19]:=
F=(Abs[#[[1]]]<Pi/2)&&(Abs[#[[2]]]<Pi)&; In[20]:= F[{1,3}]
Out[20]= True
In[17]:= F/@pts
Out[17]= {True,False,False}
Let me know when you find a more elegant solution! Cheers, Martin
Naum Phleger wrote in message <72588n$8an at smc.vnet.net>...
> I have a discreet set of {x,y} points and I want to check if each is
>in a particular continuos set of {x,y} points. I can only define the
>region parametrically but other then that it looks something like this
>
>region= {-1<x<1 , 0<y<2}
>
>I want to perform a test like
>
>{x,y} "included in" region
>
>{0,1} "included in" region
> ->True
>
>{5,7} "included in" region
> ->False
>
> Is this possible My region is defined in a more difficult manner.
>It looks more like this
>
>
>region = F[{theta,fi}] for {-pi/2 < theta < pi/2}, {-pi < fi < pi }
>
>where F returns an {x,y} pair
>
> -NAUM
>