collinearity

  1. J

    Cubic coefficients using LINEST

    Hi, I am trying to LINEST to return coefficients using a cubic function in Excel 2013 but I am getting wrong results for two of the coefficients. Using the builtin Chart Trendline produces correct coefficient for my regression but LINEST (and Data Analysis Regression for that matter) produces...
  2. M

    Why does application.linest imply collinearity?

    Hi, I am totally puzzled by the behaviour of VBA application.linest. I am trying to create a function that is dynamic in respect of the order of a polynom that is fitted to a known set of data. That is, with a least square approximation trying to fit f(x)=a*x^i+b*x^(i-1)+...+constant term. Now...

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