Hey J
Here is one suggestion:
1) use cftool as you do to make a fit on your data. Once you are are done, in the cftool window you go to "File", and click "Generate Code"
That should give you a m-file that basically, when run, gives you the same result as when you manually used cftool.
2) Now you use the output from the fit-function which you see in this m-file.
The second output from fit, say it is called gof, is a goodness-of-fit-struct which contains fx. rmse (standard error)
so I think you look for:
gof.rmse
3) Play with the plotting-function errorbar(...)
Takes:
figure errorbar(X,Y,E)
where E is the errorbar value on Y for a given X
so E associates with gof.rmse if I understand correctly if X and Y are the fit data, not the real data.
Hope this helps.
I found it useful to read about "fit" in the documentation.
Best
Mads
