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Curve fitting software

  1. Aug 7, 2014 #1
    Is there a software(preferably free) that can fit data into a 4 parameter equation?

    like the generalised logistic function
     
  2. jcsd
  3. Aug 8, 2014 #2
    TableCurve is great for the type of fitting you need, but it's not free... This is a good site where one can select operating system, rating etc. and look for curve fitting packages that are either free or shareware. There is a wide selection, so I am confident you will in high likelihood find what you need for free;

    http://download.cnet.com/
     
  4. Aug 8, 2014 #3
  5. Aug 9, 2014 #4
    free? you can do it in python using the scipy module (scipy.optimize)...google "scipy curve fit", you should even find examples.
     
  6. Apr 4, 2016 #5
    Good source of information will span over many many years. Recently, I wanted to obtain a curve fitting equation from the given graph image / published graph. I felt so powerless to do so. This CurveFit Tracer may be helpful to some of you.
     
  7. Apr 25, 2016 #6
    Me thinks that maybe 'CurveFit Tracer' could be used to turn vacuum tube operating curves into useable mathematical equations! Has anybody tried this?
     
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