Get 95% Confidence Values from Fit Coefficients

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Scott
Scott 2011-12-19
Hey, I've run a curve fit and have various coefficient outputs. For example:
A = 13.34 (12.37, 14.31)
B = 9.955 (6.182, 13.73)
Any idea how I can save a vector such as:
dA=(12.37, 14.31) and dB=(6.182, 13.73)? Everything is run via my .m file so I don't want to do this by any mouse-commands in a GUI but rather via a command within the .m file. Thanks.

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Sean de Wolski
Sean de Wolski 2011-12-19
per comments:
doc confint
will explain how to extract the confidence interval parameters from a fit object.
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Sean de Wolski
Sean de Wolski 2011-12-19
Did you run the curve fit in the curve fit tool (cftool) of the curve fitting toolbox?
Scott
Scott 2011-12-19
I ran it via a command in the .m file since the fit is contained within a loop:
f = fittype(...)
[c2,gof2] = fit(xdata,ydata,f,...)

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Scott
Scott 2011-12-19
Sean's help worked! [c2,gof2] = fit(xdata,ydata...etc) ci = confint(c2) Gives the variable ci a vector of all the uncertainties. I can then save dA(1,1)=ci(1,1) and dA(1,2)=ci(1,2) etc.

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