User Guide

139
Data Transform
ations
Old Value. The value(s) to be recoded. You can recode single values, ranges of values,
and missing values. System-missing values and ranges cannot be selected for string
variables b
ecause neither concept applies to string variables. Ranges include their
endpoints and any user-missing values that fall within the range.
 Value. Individual old value to be recoded into a new value. The value must be the
same data ty
pe (numeric or string) as the variable(s) being recoded.
 System-mi
ssing.
Values assigned by the program when values in your data are
undefined according to the format type you have specified, when a numeric field
is blank, or when a value resulting from a transformation command is undefined.
Numeric sy
stem-missing values are displayed as periods. String variables cannot
have system-missing values, since any character is legal in a string variable.
 System- or user-missing. Observations with values that either have been defined as
user-missing values, or are unknown and have been assigned the system-missing
value, wh
ich is indicated with a period (.).
 Range. I
nclusive range of values. Not available for string variables. Any
user-missing values within the range are included.
 All other values. Any remaining values not included in one of the specifications on
the Old-New list. This appears as ELSE on the Old-New list.
New Value. The single value into which each old value or range of values is recoded.
You can en
ter a value or assign the system-missing value.
 Value. V
alue into which one or more old values will be recoded. The value must
be the same data type (numeric or string) as the old value.
 System-missing. Recodes specified old values into the system-missing value.
The system-missing value is not used in calculations, and cases with the
system-
missing value are excluded from many procedures. Not available for
string variables.
Old–>Ne
w.
The list of specifications that will be used to recode the variable(s). You
can add, change, and remove specifications from the list. The list is automatically
sorted, based on the old value specification, using the following order: single values,
missin
g values, ranges, and all other values. If you change a recode specification
on the list, the procedure automatically re-sorts the list, if necessary, to maintain
this order.