Re: Curve fitting or Optimization toolbox?

Enrique Cruiz wrote:
Hi guys,
I have several series of data that represents different
measurements of the same process. So when I plot the
curve for each of these series, it is obvious to see that
they all closely match. What I would like to do is
finding an equation that would best fit _all_ these
curves.

I tried with the curve fitting tool, but I can only
select one of them at a time, hence the fit is only
performed on the one curve selected, but not all. Is
there a way to perform a fitting with multiple series
of data, to find the global best fit?

I thought as well of trying the optimization toolbox, but
I could not find a way to specify multiple data sets on
which to perform the optimization. Does someone know how
to du such a thing?

Thanks in advance,

Enrique

One way would be to concatenate the data sets, that is, make one big
data set containing the data from all the series and do the curve fit
on that.

Ken
.

Relevant Pages

  • Re: identify separate weighted probability plots
    ... Anyway, the probability plot is bi-modal and I would like to fit separate weighted curves to the peaks, plot, and have some sort of confidence number plotted and displayed. ... I believe you want to treat this as a distribution fitting problem instead of creating a histogram and fitting a curve to the bar heights. ...
    (comp.soft-sys.matlab)
  • Re: Fitting Data
    ... to plot this data and plot a line of best fit through it! ... My curve starts off with a curving section upwards, ... After that, you would have to fit the two sections, compute the overall residual, and move the breakpoint one direction or the other and repeat until you locate a minimum. ... A common-enough problem that might have some code at the Code Exchange, ...
    (comp.soft-sys.matlab)
  • Only 7.8 Billion (was: 9 Billion. The Population Explosion Is At And End.)
    ... This does, in fact, fit very well. ... deviations of about 10-20 million and is not a direct fit. ... The results of fitting this to the above-mentioned regularity ... surprising recent development in the world population curve. ...
    (sci.anthropology)
  • Re: comparison of two distribution curves
    ... john wrote: ... > is it as simple as saying that a straight line has a good fit to the ... Do a one-way anova on the control condition. ... Fit a curve to each condition. ...
    (sci.stat.edu)
  • Re: nlinfit vs. lsqcurvefit
    ... I have a question regading the use of either nlinfit vs. lsqcurvefit. ... I have a number of data that I want to fit with a curve (I know the ... regardless of which optimizer you use. ...
    (comp.soft-sys.matlab)