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MathGroup Archive 2005

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Re: intersection point from listplots

  • To: mathgroup at smc.vnet.net
  • Subject: [mg55605] Re: intersection point from listplots
  • From: dh <dh at metrohm.ch>
  • Date: Thu, 31 Mar 2005 01:23:56 -0500 (EST)
  • References: <d2dpc9$lsa$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi Tun,

First interpolate functions to your data points (or fit functions).
Then solve the equation fun1[x]== fun2[x] for x. E.g.:

dat1 = Table[i + Random[], {i, 10}]; dat2 = Table[10 -
      i + Random[], {i, 10}];
f1 = Interpolation[dat1]; f2 = Interpolation[dat2];
FindRoot[f1[x] == f2[x], {x, 1}]

Sincerely, Daniel

Tun Myint Aung wrote:
> Hi,
> 
>     I have two sets of lists for two curves. I can plot using ListPlot.
> What I want to know is how to get the intersection point in Mathematica.
> Any idea!
> 
> Thank in advance!
> 
> 
> With Regards,
> Tun Myint Aung (Graduate Student)
> Civil Engineering Department
> National University of Singapore
> E1A 02-18
> E-mail: g0202015 at nus.edu.sg (or) tma at nus.edu.sg
> 
> 
> 
> 
> 
> 


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