[Discuss-gnuradio] Re curve fitting

[mike revnell]

Pretty much any worthy math package like Matlab, Mathcad or my favorite 
Scilab will have a variety of facilities for this.

As I recall from many years ago Mathcad has something that I believe was 
called linfit that was pretty easy to use.

I haven't actually done this in a long time so I can't make any 
difinitive recommendations but looking through the online help for 
scilab for "least squares" turns up a couple of possibilities:

leastsq is a nonlinear least squares fitter which is almost certainly 
far more elaborate than you need.
lsq_splin does a least squares fit of a cubic spline function to the 
data. cubic splines are a mathematical
   version of  the old rubber ruler splines we used to use in our 
engineering lab notebooks.
datafit does "Parameter identification based on measured data" looks 
like the one most likely to be useful.

You can find more about Scilab at "http://www.scilab.org";. I like it 
because it's free, it's very powerful, and  it uses mathematics 
libraries that have been around long enough to be well debugged.