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DESCRIPTIVES /VARIABLES=var_list /MISSING={VARIABLE,LISTWISE} {INCLUDE,NOINCLUDE} /FORMAT={LABELS,NOLABELS} {NOINDEX,INDEX} {LINE,SERIAL} /SAVE /STATISTICS={ALL,MEAN,SEMEAN,STDDEV,VARIANCE,KURTOSIS, SKEWNESS,RANGE,MINIMUM,MAXIMUM,SUM,DEFAULT, SESKEWNESS,SEKURTOSIS} /SORT={NONE,MEAN,SEMEAN,STDDEV,VARIANCE,KURTOSIS,SKEWNESS, RANGE,MINIMUM,MAXIMUM,SUM,SESKEWNESS,SEKURTOSIS,NAME} {A,D}
The DESCRIPTIVES
procedure reads the active dataset and outputs
descriptive
statistics requested by the user. In addition, it can optionally
compute Z-scores.
The VARIABLES
subcommand, which is required, specifies the list of
variables to be analyzed. Keyword VARIABLES
is optional.
All other subcommands are optional:
The MISSING
subcommand determines the handling of missing variables. If
INCLUDE
is set, then user-missing values are included in the
calculations. If NOINCLUDE
is set, which is the default, user-missing
values are excluded. If VARIABLE
is set, then missing values are
excluded on a variable by variable basis; if LISTWISE
is set, then
the entire case is excluded whenever any value in that case has a
system-missing or, if INCLUDE
is set, user-missing value.
The FORMAT
subcommand affects the output format. Currently the
LABELS/NOLABELS
and NOINDEX/INDEX
settings are not used.
When SERIAL
is
set, both valid and missing number of cases are listed in the output;
when NOSERIAL
is set, only valid cases are listed.
The SAVE
subcommand causes DESCRIPTIVES
to calculate Z scores for all
the specified variables. The Z scores are saved to new variables.
Variable names are generated by trying first the original variable name
with Z prepended and truncated to a maximum of 8 characters, then the
names ZSC000 through ZSC999, STDZ00 through STDZ09, ZZZZ00 through
ZZZZ09, ZQZQ00 through ZQZQ09, in that sequence. In addition, Z score
variable names can be specified explicitly on VARIABLES
in the variable
list by enclosing them in parentheses after each variable.
When Z scores are calculated, PSPP ignores TEMPORARY
,
treating temporary transformations as permanent.
The STATISTICS
subcommand specifies the statistics to be displayed:
ALL
All of the statistics below.
MEAN
Arithmetic mean.
SEMEAN
Standard error of the mean.
STDDEV
Standard deviation.
VARIANCE
Variance.
KURTOSIS
Kurtosis and standard error of the kurtosis.
SKEWNESS
Skewness and standard error of the skewness.
RANGE
Range.
MINIMUM
Minimum value.
MAXIMUM
Maximum value.
SUM
Sum.
DEFAULT
Mean, standard deviation of the mean, minimum, maximum.
SEKURTOSIS
Standard error of the kurtosis.
SESKEWNESS
Standard error of the skewness.
The SORT
subcommand specifies how the statistics should be sorted. Most
of the possible values should be self-explanatory. NAME
causes the
statistics to be sorted by name. By default, the statistics are listed
in the order that they are specified on the VARIABLES
subcommand.
The A
and D
settings request an ascending or descending
sort order, respectively.
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