User`s guide

disp

4-97

Note that all fit types have the Normalize, Exclude, Weights, and Method fit

options. Additional fit options are available depending on the

Method value. For

example, if

Method is SmoothingSpline, the SmoothingParam fit option is

available.

The display for a fit result object is shown below.

fresult = fit(cdate,pop,ftype,fopts)

Warning: Start point not provided, choosing random start point.

Maximum number of function evaluations exceeded. Increasing

MaxFunEvals (in fit options) may allow for a better fit, or

the current equation may not be a good model for the data.

fresult =

General model:

fresult(x) = a*x^2+b*x+c+d*exp(-e*x)

where x is normalized by mean 1890 and std 62.05

Coefficients (with 95% confidence bounds):

a = 21.14 (-27.61, 69.89)

b = 64.49 (-188.5, 317.4)

c = 49.92 (-421.5, 521.4)

d = 11.96 (-458, 481.9)

e = -0.7745 (-10.25, 8.701)