@cmd{FLIP} transposes rows and columns in the active file. It
causes cases to be swapped with variables, and vice versa.
+All variables in the transposed active file are numeric. String
+variables take on the system-missing value in the transposed file.
+
No subcommands are required. The VARIABLES subcommand specifies
variables that will be transformed into cases. Variables not specified
are discarded. By default, all variables are selected for