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curvefit Q [message #24259]

Mon, 19 March 2001 10:03

Stuart Colley
Messages: 17
Registered: February 2000

Junior Member

I notice that Curvefit can return a variable, 'sigma'. I'm not quite
clear on what this is, the help page says it's the standard deviation for
each of the fit parameters, fine, but one might more commonly come across
a standard deviation as in the standard deviation of a mean of some
values. It probably doesn't make much sense to me since there's no mean
being done here, just a non-linear least squares fit. Is there anyway of
translating these standard deviations into an error so you can quote:

parameter_value +/- error?

regards,
S

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