SPSS® 12.0 Command Syntax Reference

VERIFY
VERIFY [VARIABLES=series name]
Example
Overview
Options
VERIFY VARIABLE=STOCK.
VERIFY produces a report on the status of the most current DATE, USE, and PREDICT
specifications. The report lists the first and last observations in the working data file,
the current USE and PREDICT ranges, and any anomalies in the DATE variables. The
number of missing values and the values of the first and last observations in the file and
in the USE and PREDICT ranges can also be displayed for a specified series.
VERIFY should be used before a time series procedure whenever there is a possibility that
DATE variables or USE and PREDICT ranges have been invalidated. In particular, the working
data file should be verified after you have modified the file structure with commands
such as SELECT IF, SORT CASES, and AGGREGATE.
If a series is specified after VERIFY, the values of the first and last observations in the file
and in the USE and PREDICT periods are reported for that series. In addition, the number of
observations in the working data file that have missing values for that series is displayed.
This can be useful for determining the USE ranges that do not include any missing values.
Basic Specification
The basic specification is the command keyword VERIFY.
• VERIFY displays the first and last observations in the working data file and in the USE
and PREDICT ranges. This information is presented by case number and by the values of
the DATE variables.
• For DATE variables, VERIFY reports the number of missing or invalid values. In addition,
DATE variables that are not properly nested within the next higher-level DATE variable,
that have start or end values other than those expected at the beginning or end of a cycle,
or that increment by more than the expected increment are flagged with an asterisk next
to the problem. An explanation of the problem is given.
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