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*Subject*: multiple non-linear regression analysis*From*: "Kenlo Nishida" <kenlo(at)ntsg.umt.edu>*Date*: Tue, 17 Apr 2001 12:28:57 -0600*Newsgroups*: comp.lang.idl-pvwave*Xref*: news.doit.wisc.edu comp.lang.idl-pvwave:24583

Dear IDL news group: How can I make multiple non-linear regression analysis with IDL? I know "LMFIT" command can make a non-linear regression analysis for a single independent variable. However, I want to know an appropriate command or function of IDL which provide me with a fitting of an arbitrary non-linear function with two or more independent variables. I mean, I want to determine the following three parameters (a, b, c): y=f(x1, x2, x3; a, b, c) Here x1, x2, and x3 are arrays of independent variables each containing n data. y is an array of dependent variable with n data. a, b, and c are scalars (parameters) which determine the non-linear function f(x1, x2, x3). Kenlo Nishida Numerical Terradynamic Simulation Group (NTSG)/EOS training Center School of Forestry, The University of Montana, Missoula, MT 59812, USA Office (406) 243-4693; Fax (406) 243-4510 kenlo@ntsg.umt.edu

**Follow-Ups**:**Re: multiple non-linear regression analysis***From:*Craig Markwardt

**Re: multiple non-linear regression analysis***From:*William Thompson

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