SPSS® 12.0 Command Syntax Reference

110 ALSCAL
• Algorithmic options listed by PRINT=HEADER include the maximum number of iterations
permitted, the convergence criterion, the maximum S-stress value, whether or not missing
data are estimated by upper and lower bounds, and the amount of storage allotted for ties
in ordinal data.
Example
ALSCAL VAR=ATLANTA TO TAMPA /PRINT=DATA.
• In addition to scaled data, ALSCAL will display initial data.
PLOT Subcommand
PLOT controls the display of plots. The minimum specification is simply PLOT to produce
the defaults.
DEFAULT Default plots. Default plots include plots of stimulus coordinates, matrix
weights (if the model is INDSCAL, AINDS, or GEMSCAL), and stimulus
weights (if the model is AINDS or ASCAL). The default also includes a scatterplot
of the linear fit between the data and the model and, for certain types
of data, scatterplots of the nonlinear fit and the data transformation.
ALL Transformation plots in addition to the default plots. SPSS produces a separate
plot for each subject if CONDITION=MATRIX and a separate plot for each
row if CONDITION=ROW. For interval and ratio data, PLOT=ALL has the same
effect as PLOT=DEFAULT. This option can generate voluminous output, particularly
when CONDITION=ROW.
Example
ALSCAL VAR=V1 TO V8 /INPUT=ROWS(8) /PLOT=ALL.
• This command produces all the default plots. It also produces a separate plot for each subject’s
data transformation and a plot of V1 through V8 in a two-dimensional space for each
subject.