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Programming an interaction

asked 2020-04-10 10:18:06 +0200

Cyrille gravatar image

updated 2020-04-10 11:17:31 +0200

FrédéricC gravatar image

Certainly due to my lack of competence this code

  pol = polygon([(0,0), (0,10), (10,10), (0,0)], fill=True,  rgbcolor=(0.81,0.81,0.81)) 
  g = plot(x,(0,10),color="blue",ymin=0,ymax=10)
  def _(c=slider(0,1,step_size=0.2,default=.5),inac=checkbox(True,"Domaine Inaccessible")):
      a = solve(-c*x+6==x, x)
      aa = a[0].right()
      h = plot(-c*x+6,(aa, 6),color="green",ymin=0,ymax=10)
      graph = h+g 
      if inac :
          graph += pol    

conplains that graph is not defined.

Is there some thing I have not understood in the construction of @interact?

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answered 2020-04-10 18:33:59 +0200

Juanjo gravatar image

updated 2020-04-10 20:08:32 +0200

Perhaps the problem came from indentation, that I have had to adjust a bit. Try this:

pol = polygon([(0,0), (0,10), (10,10), (0,0)], fill=True, rgbcolor=(0.81,0.81,0.81)) 
g = plot(x, (0,10), color="blue")
def _(c=slider(0.01,1, step_size=0.2, default=.5), 
      inac=checkbox(True,"Domaine Inaccessible")):
    a = x.subs(solve(-c*x+6==x, x))
    h = plot(-c*x+6, (a,6), color="green")
    graph = h+g 
    if inac:
        graph += pol    
    show(graph, aspect_ratio=1, ymin=0,ymax=10)

By the way, the code failed if c=0, as I already pointed in other question, and the plot didn't keep proportions when checking or unchecking inac. I've modified the code to deal with these problems.

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Asked: 2020-04-10 10:18:06 +0200

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Last updated: Apr 10 '20