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Re: Calculating RMSE from 2D Data

  • To: mathgroup at smc.vnet.net
  • Subject: [mg90905] Re: [mg90850] Calculating RMSE from 2D Data
  • From: klamser <klamser at t-online.de>
  • Date: Tue, 29 Jul 2008 01:38:00 -0400 (EDT)
  • References: <200807260821.EAA12983@smc.vnet.net>

Use Interpolation to get a representation of your data.

With the interpolated function you can then produce a list of regular 
synthetic data.

Peter

sle schrieb:
> I'm using Mathematica 6 to analyze some 2D laboratory data obtained at
> irregular points. My data is in the form (x,y,z), where x and y are
> spatial coordinates and z is my variable of interest. I'm able to plot
> the data using ListContourPlot for qualitative analysis.
>
> However, I'm running into some difficulty trying to quantitatively
> measure the variance of my data. I'd like to obtain a table of values
> at regular spacings in my data set and calculate the RMSE (root mean
> square error) or coefficient of variance (std. dev. / mean). Is there
> a way I can get Mathematica to extract values from my contour plot or
> otherwise do a 2D interpolation of my data?
>
> Thanks in advance, and please let me know if I can clarify anything.
>
>
>
>   



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