Deprecated: preparse_list_tag(): Optional parameter $type declared before required parameter $errors is implicitly treated as a required parameter in /customers/5/9/f/padowan.dk/httpd.www/forum/include/parser.php on line 524
  • SCC
  • Member
  • Offline

Topic: Shading circle not centred at (0,0)

Hello there

I am able to shade a polar-function circle centred at the origin (eg r(t)=1). I am also able to construct a relation circle (eg (x-2)^2+(y-2)^2=1) away from the origin, but then Insert Shading is greyed out.  How do I shade a circle not centred at (0,0)?

Thanks for any guidance!

Re: Shading circle not centred at (0,0)

Adding shadings to relations are unfortunately not supported. However relations can be inequalities, e.g. (x-2)^2+(y-2)^2 < 1. Alternatively you can use a parametric function, e.g. x(t)=cos(t)+2, y(t)=sin(t)+2, which you can then add a shading to.

  • SCC
  • Member
  • Offline

Re: Shading circle not centred at (0,0)

Great answer, Ivan.  The relation method and the parametric method each do the job perfectly.