SPSS® 12.0 Command Syntax Reference

ALSCAL 109
NOULB Do not estimate upper and lower bounds on missing values. By default,
ALSCAL estimates the upper and lower bounds on missing values
in order to compute the initial configuration. This specification has no
effect during the iterative process, when missing values are ignored.
DIMENS(min[,max]) Set the minimum and maximum number of dimensions in the scaling
solution. By default, ALSCAL calculates a solution with two dimensions.
To obtain solutions for more than two dimensions, specify the
minimum and the maximum number of dimensions in parentheses after
DIMENS. The minimum and maximum can be integers between 2
and 6. A single value represents both the minimum and the maximum.
For example, DIMENS(3) is equivalent to DIMENS(3,3). The minimum
number of dimensions can be set to 1 only if MODEL=EUCLID.
DIRECTIONS(n) Set the number of principal directions in the generalized Euclidean
model to n. This option has no effect for models other than GEMSCAL.
The number of principal directions can be any positive integer between
1 and the number of dimensions specified on the DIMENS option.
By default, the number of directions equals the number of
dimensions.
TIESTORE(n) Set the amount of storage needed for ties to n. This option estimates
the amount of storage needed to deal with ties in ordinal data. By default,
the amount of storage is set to 1000 or the number of cells in a
matrix, whichever is smaller. Should this be insufficient, ALSCAL terminates
and displays a message that more space is needed.
CONSTRAIN Constrain multidimensional unfolding solution. This option can be
used to keep the initial constraints throughout the analysis.
PRINT Subcommand
PRINT requests output not available by default. You can specify the following:
DATA Display input data. The display includes both the initial data and the scaled
data for each subject according to the structure specified on SHAPE.
HEADER Display a header page. The header includes the model, output, algorithmic,
and data options in effect for the analysis.
• Data options listed by PRINT=HEADER include the number of rows and columns, number
of matrices, measurement level, shape of the data matrix, type of data (similarity or dissimilarity),
whether ties are tied or untied, conditionality, and data cutoff value.
• Model options listed by PRINT=HEADER are the type of model specified (EUCLID,
INDSCAL, ASCAL, AINDS, or GEMSCAL), minimum and maximum dimensionality, and
whether or not negative weights are permitted.
• Output options listed by PRINT=HEADER indicate whether the output includes the header
page and input data, whether ALSCAL plotted configurations and transformations, whether
an output data set was created, and whether initial stimulus coordinates, initial column
stimulus coordinates, initial subject weights, and initial stimulus weights were computed.