SPSS® 12.0 Command Syntax Reference

CATPCA 205
procedures with the successfully executed SAVE subcommands for a given data file in a
continuous SPSS session. For example, if two dimensions are specified following
OBJECT, the first set of default names, if they do not exist in the data file, would be
OBSCO1_1 and OBSCO2_1. The next set of default names, if they do not exist in the data
file, would be OBSCO1_2 and OBSCO2_2. However, if, for example, OBSCO2_2 already
exists in the data file, then the default names should be attempted as OBSCO1_3 and
OBSCO2_3. That is, the second number increments to the next available integer.
• As m and/or n increase for OBJECT, the rootname is truncated to keep variable names
within eight characters. For example, OBSCO9_1 would be followed by OBSC10_1. The
initial character (O for the default rootnames) is required. Note that the truncation is done
variable-wise, not analysis-wise.
• Following APPROX, a rootname can be specified in parentheses, to which CATPCA adds
two numbers separated by the symbol _. The first number uniquely identifies the source
variable names, and the last number uniquely identifies the CATPCA procedures with the
successfully executed SAVE subcommands (see the next bullet for more details). Only one
rootname can be specified, and it can contain up to five characters (if more than one rootname
is specified, the first rootname is used; if a rootname contains more than five
characters, the first five characters are used at most).
• If a rootname is not specified for APPROX, rootname APP is used to automatically
generate unique variable names. The formula is ROOTNAMEk_n, where k increments from
1 to identify the source variable names by using the source variables’ position numbers in
the ANALYSIS subcommand, and n increments from 1 to identify the CATPCA procedures
with the successfully executed SAVE subcommands for a given data file in a continuous
SPSS session. For example, with three variables specified on ANALYSIS, and LEVEL =
MNOM for the second variable, the first set of default names, if they do not exist in the data
file, would be APP1_1, APP2_1, and APP3_1. The next set of default names, if they do not
exist in the data file, would be APP1_2, APP2_2, and APP3_2. However, if, for example,
APP1_2 already exists in the data file, then the default names should be attempted as
APP1_3, APP2_3, and APP3_3. That is, the last number increments to the next available
integer.
• As k and/or n increase for APPROX, the rootname is truncated to keep variable names
within eight characters. For example, if APPRO is specified as a rootname, APPRO1_9
would be followed by APPR1_10. Note that the truncation is done variable-wise, not
analysis-wise.
• Variable labels are created automatically. (They are shown in the procedure information
table, or the notes table, and can also be displayed in the Data Editor window.)
• If the number of dimensions is not specified, the SAVE subcommand saves all dimensions.
OUTFILE Subcommand
The OUTFILE subcommand is used to write the discretized data, transformed data (category
indicators replaced with optimal quantifications), the object scores, and the approximation to
an external data file. Excluded cases are represented by a dot (the system-missing symbol)
on every saved variable.
DISCRDATA(file) Discretized data.