TRANSFORM Subcommand (MANOVA: Multivariate command)

TRANSFORM performs linear transformations of some or all of the continuous variables (dependent variables and covariates). Specifications on TRANSFORM include an optional list of variables to be transformed, optional keywords to describe how to generate a transformation matrix from the specified contrasts, and a required keyword specifying the transformation contrasts.

• Transformations apply to all subsequent designs unless replaced by another TRANSFORM subcommand.
• TRANSFORM subcommands are not cumulative. Only the transformation specified most recently is in effect at any time. You can restore the original variables in later designs by specifying SPECIAL with an identity matrix.
• You should not use TRANSFORM when you use the WSFACTORS subcommand to request repeated measures analysis; a transformation is automatically performed in repeated measures analysis (see MANOVA: Repeated Measures).
• Transformations are in effect for the duration of the MANOVA procedure only. After the procedure is complete, the original variables remain in the active dataset.
• By default, the transformation matrix is not displayed. Specify the keyword TRANSFORM on the PRINT subcommand to see the matrix generated by the TRANSFORM subcommand.
• If you do not use the RENAME subcommand with TRANSFORM, the variables specified on TRANSFORM are renamed temporarily (for the duration of the procedure) as T1, T2, and so on. Explicit use of RENAME is recommended.
• Subsequent references to transformed variables should use the new names. The only exception is when you supply a VARIABLES specification on the OMEANS subcommand after using TRANSFORM. In this case, specify the original names. OMEANS displays observed means of original variables. See OMEANS Subcommand (MANOVA: Univariate command).