# Grapher Error

#### faraz.yashar

##### macrumors newbie
Original poster
I'm currently working with cylindrical coordinates (r, theta, z), and I decided to test some simple graphs before I began working.

The first graph I tested was r = 3 which should have yielded a cylinder, but I got a sphere instead as if I had graphed the equation in spherical coordinates!

I decided to create a point set to see whether the app could plot cylindrical coordinates correctly by creating points with r = 3, and the points seemed to form a cylinder.

So apparently, grapher can plot correctly in cylindrical coordinates, but not graph! Ideas?

#### GGJstudios

##### macrumors Westmere
You haven't mentioned anything about what computer, operating system or application you're using.

#### faraz.yashar

##### macrumors newbie
Original poster
OS X 10.6.3
MacBook Pro
And as mentioned in the titled the app is Grapher.

I've figured out the error. Apparently grapher can graph any equation with any coordinate axis. The various systems can be utilized depending on the variables called. For whatever reason, r has been reserved for spherical coordinates while r_0 has been reserved for cylindrical coordinates even though theta is interchangeable. A bit stupid but hell... it still works.

#### YB24

##### macrumors member
Grapher : manuals (french and english)

Questions about Grapher in this forum will find answers here :

Pour les amateurs de mathématiques et sciences,

" Grapher " est dans les utilitaires des applications de Mac OS X 10.4, 10.5 & 10.6 ; c'est un très intéressant logiciel traceur de graphes mathématiques et éditeur d'équations, dont l'aide beaucoup trop succinte ne dévoile qu'une petite partie des possibilités. Une notice plus complète de 68 pages en langue française, illustrée de copies d'écran et débutant par une initiation progressive, est téléchargeable gratuitement sur les sites suivants :
< http://macetprof.free.fr/MacEtProf/Grapher.html > " ManuelGrapher05112009 " & " 2D Examples " & " 3D Examples " ;
< http://freeware.avosmac.com/ > lettre G > Grapher (le manuel) ;
< http://edu.mac.free.fr/index-a.php?trucs=719&page=7 > logiciels, Grapher, télécharger le manuel de Grapher.
En pièces jointes : une fiche de présentation du "Mode d'emploi Grapher", le sommaire de ce manuel et la liste des bugs en français et en anglais.

Autre manuel en anglais, PDF et leçons video téléchargeables sur :
< http://homepage.mac.com/tlindywizdumb/math/Grapher_index.htm > (bien pour débuter simplement, beaucoup moins de détails que le mode demploi en français, bugs ignorés, pas de tableaux de synthèse).
< http://guides.macrumors.com/Grapher > (anglais) un tableau avec des précisions sur les symboles mathématiques et quelques graphes 2D, bugs inconnus.

Cordialement, Yves Barois

For persons interested in mathematics and sciences,

"Grapher" is an Applications Utility of Mac OS X 10.4, 10.5 & 10.6, it is a very interesting graph plotter software and math equation editor, but Grapher's Help is a lot too brief and reveals only a small fraction of its possibilities . A more complete manual of 68 pages in French, illustrated with screen captures and starting with tutorials, is downloadable free on the following websites :
< http://macetprof.free.fr/MacEtProf/Grapher.html > " ManuelGrapher05112009" & " 2D Examples " & " 3D Examples " ;
< http://freeware.avosmac.com/ > letter "G" > Grapher (le manuel) ;
< http://edu.mac.free.fr/index-a.php?trucs=719&page=7 > logiciels, Grapher, télécharger le manuel de Grapher.
Attachments : a presentation of "Mode d'emploi de Grapher", the contents of this manual (French language) and the bugs list (French and English).

An english manual, PDF and video tutorials to be downloaded on :
< http://homepage.mac.com/tlindywizdumb/math/Grapher_index.htm > (easy for new users, bugs unknown, no tables for syntax, keyboard shortcuts, etc. : a lot more details in the french manual.
< http://guides.macrumors.com/Grapher > (english) a tables with some details about math symbols, a few 2D curves bugs unknown.

Sincerely, Yves Barois

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