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. > > > >

**References**:**Calculating RMSE from 2D Data***From:*sle <zeroion@gmail.com>