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 Author Comment/Response Gaetano Barbato 01/31/05 05:22am Hello I'm using mathematica 5.0, and trying to perform the following minimization: I have a set of data (x,y) to fit with a non linear equation: x = (y/a) + b/a ( ln(y0 /(y0-y) ) ) Where y0 = 0.000250, and a,b are the parameters to optimize. First guess values for a= 0.000003 , b= 0.000034 The minimization should be obtained by minimizing the SUM(xexp - xcalc)^2 the exp data are of the type: y x 0.006 0.050 0.011 0.100 0.016 0.200 0.019 0.300 0.024 0.500 0.034 1.000 0.042 1.500 0.051 2.000 The way I implemented this is following the guidelines of one of your posted questions, these are the exact steps I did and the Mathematica response: first I write the guessed parameters (a,b) and generate with the equation a table of data, to see if the equation is well understood by the software. Then I try to fit the data generated with the equation by varying the data (a,b). Here I got errors. URL: ,

 Subject (listing for 'non linear fit') Author Date Posted non linear fit Gaetano Barb... 01/31/05 05:22am Re: non linear fit Forum Modera... 01/31/05 10:19am Re: non linear fit Gaetano Barb... 02/01/05 02:59am
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