1 In the graph dialog box, click
Data View.
2 Click
the Smoother tab.
3 Under Lowess
Smoothing Parameters, choose Lowess.
If you like, do one or both of the following:
· In
Degree of smoothing,
enter a number between 0 and 1 for the fraction (f) of the total number
of points to use to calculate the fitted values at each x-value. The default
is 0.5. See Specifying
lowess smoothing parameters.
· In
Number of steps,
enter a number from 0 to 10 to specify the number of iterations of smoothing
used to limit the influence of outliers. Each step reduces the weight
given to outliers in the next iteration. The default is 2.
See Specifying
Lowess Smoothing Parameters for details.
4 Click OK
in each dialog box.
To fit a lowess smoother