CASEPLOT VARIABLES = TICKETS
/LN
/DIFF
/SDIFF
/PERIOD=12
/FORMAT=REFERENCE
/MARK=Y 55 M 6.
- This example produces a plot of TICKETS after a natural log transformation, differencing,
and seasonal differencing have been applied.
- LN transforms
the data using the natural logarithm (base e) of the variable.
- DIFF differences
the variable once.
- SDIFF and PERIOD apply one degree of seasonal differencing
with a periodicity of 12.
- FORMAT=REFERENCE adds a reference line at the variable mean.
- MARK provides
a marker on the plot at June, 1955. The marker is displayed as a horizontal
reference line.