Grapher: How to revise definitions

Discussion in 'Mac Apps and Mac App Store' started by ritachengl, Jun 7, 2013.

  1. ritachengl macrumors newbie

    Joined:
    Mar 10, 2011
    #1
    Hi there,

    I have no problems in writing definitions and equations in grapher. But when I tried to revise definitions, error message shows saying "Cannot remove definition. The definition is used by another element." But I did not remove, just replace a constant number with a new parameter. For example,

    The original one:
    y=x+b
    b:=1

    Now I want it to be:
    y=x+b
    b:=a
    a:=2

    But when I try to revise the definition of b, grapher does not allow me showing the above error message.

    Anyone has the same problem and can help me with that?

    Thanks a lot!!

    Rita
     
  2. YB24 macrumors member

    Joined:
    Apr 3, 2007
    Location:
    Dordogne-France http://y.barois.free.fr/grapher/
    #2
    Grapher :

    Bonjour Rita,
    First way. A question of sequence :
    b = 1
    y = x + b then
    a = 2 then
    modify equation b = 1 above by changing 1 into a

    Second way. Render inoperative all equations using the parameter to be modified, by adding the sign = in front of them :
    b = 1
    y = x + b > =y = x + b
    change b = 1 into b = a
    a = 2
    cancel = to restore y = x + b
    It's very easy, done quickly, can be used for a lot of equations.

    Useful free documentation for Grapher.app only (French and English) on <http://y.barois.free.fr/grapher/>

    Enjoy,
    YB24
     

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