Re: [Gnuplot-info] plot 2D circle in 3D graph

[jody <jod...@gm...>]

Hi Amir

Yes. For patametric curves you first have to type

  set parametric

next set your constants
  R=5
  d=4
  e=6
  c=15

and then do the plotting (splot is for 3d plots)
  splot [t=0:2*pi]  d+R*cos(t), e+R*sin(t),c

Hope this helps
Jody

On Wed, Apr 20, 2011 at 12:28 PM, Amir Sabbagh <ami...@gm...> wrote:
> Thank you Jody for the tip. The problem with this option is that I get a
> "undefined variable: t" error when I try to splot it.
> Maybe there is a workaround for this?
>
> Amir
>
> On 20 April 2011 12:00, jody <jod...@gm...> wrote:
>>
>> Hi Amir
>>
>> You could try a parametric version of your circle:
>>  x = d+R*cos(t)
>>  y = e+R*sin(t)
>>  z = k
>>
>> This gives you a horizontal circle centered at (d,e,k)
>> For a tilted circle you would have to apply rotations
>> around the x and/or y axis.
>>
>> Jody
>>
>>
>> On Wed, Apr 20, 2011 at 11:36 AM, Amir Sabbagh <ami...@gm...> wrote:
>> > Hi you all,
>> >
>> > I am trying to plot a circle and a plane with splot.
>> >
>> > I would like to have a circle at a Z=const value. I have tryed with
>> > ternary
>> > operation with no success.
>> >
>> >   splot a*x+b*y+c title "Plane", \
>> >   (x-d)**2 + (y-e)**2 - R**2==0? ((x-d)**2 + (y-e)**2 - R**2): 0/0 with
>> > title "Circle"
>> >
>> > Can someone enlight me?
>> >
>> > Thank you
>> > Amir
>> >
>> >
>> > --
>> > **************************************************************
>> > Amir Sabbagh
>> > Il mio sito / My site: http://almucantarat.altervista.org
>> > **************************************************************
>> >
>> > ------------------------------------------------------------------------------
>> > Benefiting from Server Virtualization: Beyond Initial Workload
>> > Consolidation -- Increasing the use of server virtualization is a top
>> > priority.Virtualization can reduce costs, simplify management, and
>> > improve
>> > application availability and disaster protection. Learn more about
>> > boosting
>> > the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev
>> > _______________________________________________
>> > gnuplot-info mailing list
>> > gnu...@li...
>> > https://lists.sourceforge.net/lists/listinfo/gnuplot-info
>> >
>
>
>
> --
> **************************************************************
> Amir Sabbagh
> Il mio sito / My site: http://almucantarat.altervista.org
> **************************************************************
>
>