draw parabola

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emrah kara
emrah kara 2011-12-28
Write a Matlab m-file to input three points (x1,y1), (x2,y2) and (x3,y3) in the x-y plane, and to draw the function and output the equation of a parabola passing through these points.
haw can draw?

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采纳的回答

Sean de Wolski
Sean de Wolski 2011-12-28
doc linspace
doc plot
doc ezplot %If you have the symbolic math toolbox
A few pointers.
  2 个评论
Sean de Wolski
Sean de Wolski 2011-12-28
Okay, I'll give you a bigger hint:
doc polyfit %and friends
Jan
Jan 2011-12-29
I prefer the "doc polyfit" hint. +1

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更多回答（2 个）

emrah kara
emrah kara 2011-12-28
we will take the three points from the keyboard then we will draw a parabola which intercepts these points so we need a method to solve this problem.
  1 个评论
John D'Errico
John D'Errico 2011-12-28
So? This is not the we do your homework site. Sean has already given you some hints to get started. Why not make a stab at it? If you have a problem with something, THEN ask a question.

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Jose Jeremias Caballero
Hello, you improve your question.
Your question would be:
1). Write a program in Matlab, to find the equation of the parabola with focal axis parallel to the X axis passing through the points (x1, y1), (x2, y2) and (x3, y3).
2). Write a program in Matlab, to find the equation of the parabola with focal axis parallel to the Y axis, passing through the points (x1, y1), (x2, y2) and (x3, y3).
3). Write a program in Matlab, to find the equation of the parabola passing through the points (x1, y1), (x2, y2) (x3, y3), (x4, y4) and (x5, y5).
  1 个评论
Jan
Jan 2012-1-1
This does not answer the OP's question.

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