Nonlinear Regression

*To*: mathgroup at smc.vnet.net*Subject*: [mg71641] Nonlinear Regression*From*: "Amin Rezaee Zadeh" <amin67r at gmail.com>*Date*: Sat, 25 Nov 2006 05:37:22 -0500 (EST)

Hello, I'm a physics student.I have done an experiment .I want to use Mathematica , I found a problem in using it : for example I have data ={ {0,0},{1,2},{3,6}} and I want to fit them for a equation such as " y=Log[Cosh[a*x]] " so I want the value of parametre"a" and also its error(i.e. a=0.045+- 0.05 then error is 0.05 ) and also the regression (i.e. R=0.995 ) please ,please , tell me how I can do it ? I have seen the help browser but i did'nt understand. could you please possibly try it and send me the programme. also could you tell me what "Asymptotic SE " and "CI" mean?