1 Do one of the following:
· Click
on the graph editing toolbar and choose Smoother
from the Add List.
· Right-click
the active graph and choose Add >
Smoother.
· Choose
Editor > Add > Smoother.
2 Under
Lowess Smoothing Parameters,
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.
3 To
use the same grouping variables for the fitted line as is used for all
other data
displays, check Apply
same groups of current displays to lowess smoother.
4 Click OK.
To add a lowess smoother