Tag Archives: non-linear regression

Using Linest for non-linear curve fitting, examples, hints and warnings

Since I wrote Using LINEST for non-linear curve fitting in 2011 it has been by far the most popular post on this blog.  This post (in response to a recent question) provides some more detailed guidance on how to apply the function … Continue reading

Posted in Curve fitting, Excel | Tagged , , , , , , | 3 Comments

Daily Download 14: Curve Fitting 1

Today’s download topic covers fitting a straight line or curve to scattered data, using the “least squares” method.  Fitting a spline curve to pass exactly through a series of points will be covered in a few days. Use of the … Continue reading

Posted in AlgLib, Charts, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , , | Leave a comment

Non linear regression – 2; ALGLIB functions

The previous post looked at using the Excel Solver to fit a non-linear equation to a given set of data, using the least squares method.  This approach is reasonably convenient and straightforward, but it has a number of disadvantages: The … Continue reading

Posted in AlgLib, Concrete, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , | 8 Comments

Non linear regression – 1

Recent posts have described how to fit linear equations (or equations that can be made linear) to a set of data, using the Excel Linest functions, or User Defined Functions (UDF’s) linking to the ALGLIB library (see Using LINEST for non-linear … Continue reading

Posted in AlgLib, Concrete, Excel, Maths, Newton | Tagged , , , | 4 Comments