Note: To apply forecasting, the
line chart must contain a date or datetime item.
On the
Properties tab for the line chart
visualization, you can adjust the number of
data points to predict by using the
Duration option.
You can also specify the degree of confidence for the confidence band
by using the
Confidence option.
On the
Roles tab, you can add measures to the
forecast as
Underlying factors. The forecasting model evaluates the additional measures to determine whether they
contribute to the
accuracy of the forecast. If the additional measures do not increase the accuracy
of the forecast, then they are not used. If the additional measures do increase the
accuracy of the forecast, then the forecast line is adjusted, and the confidence bands
are narrowed.
Note: Underlying factors are available
only if your line chart contains a single measure in the Measures role.