Re: Re: A question about a sphere
- To: mathgroup at smc.vnet.net
- Subject: [mg107127] Re: [mg107075] Re: A question about a sphere
- From: DrMajorBob <btreat1 at austin.rr.com>
- Date: Wed, 3 Feb 2010 06:12:02 -0500 (EST)
- References: <hk6cu2$m1a$1@smc.vnet.net> <201002020827.DAA08742@smc.vnet.net>
- Reply-to: drmajorbob at yahoo.com
That doesn't work as written, but it does if you change the first
statement to
R = 1
or better yet, replace R with r in the other statements.
Bobby
On Tue, 02 Feb 2010 02:27:31 -0600, JH <jlucio at ubu.es> wrote:
> On 1 feb, 12:12, Marwa Abd El-Wahaab <m.a.elwah... at gmail.com> wrote:
>> Dear Sir,
>>
>> I am a Mathematica 7 user.
>>
>> I have a question :
>>
>> I want to draw a sphere, then draw 5 circles on this sphere like
>> *latitudes*and draw 5 lines on this sphere like
>> *longitudes*.
>>
>> I need your help.
>>
>> Thanks in advance
>>
>> Marwa Ali
>
> Hello,
>
> You can do the following:
>
> Suppose the radio is 1 an the center of the sphere is at the origin:
>
> r = 1;
> gg = Graphics3D[Sphere[{0, 0, 0}, 1]];
> pp = ParametricPlot3D[
> Table[{R Cos[\[CurlyPhi]] Cos[\[Theta]],
> R Cos[\[CurlyPhi]] Sin[\[Theta]],
> R Sin[\[CurlyPhi]]}, {\[CurlyPhi], -\[Pi]/3, \[Pi]/3, \[Pi]/
> 6}], {\[Theta], 0, 2 \[Pi]}]; (* the parallels or circles of
> latitude *)
> mm = ParametricPlot3D[
> Table[{-R Cos[\[Theta]] Sin[\[Delta]],
> R Cos[\[Theta]] Cos[\[Delta]], R Sin[\[Theta]]}, {\[Delta], 0,
> 2 \[Pi], 2 \[Pi]/5}], {\[Theta], 0, 2 \[Pi]}]; (* the
> meridians *)
> Show[gg, pp, mm] (* See all together *)
>
> JH
>
--
DrMajorBob at yahoo.com
- References:
- Re: A question about a sphere
- From: JH <jlucio@ubu.es>
- Re: A question about a sphere