STANDARDIZE and NOSTANDARDIZE Subcommands (PPLOT command)

STANDARDIZE transforms the sequence or time series variables into a sample with a mean of 0 and a standard deviation of 1. NOSTANDARDIZE is the default and indicates that the series should not be standardized.

• There are no additional specifications on the STANDARDIZE or NOSTANDARDIZE subcommands.
• Only the last STANDARDIZE or NOSTANDARDIZE subcommand on the PPLOT command is executed.
• The STANDARDIZE and NOSTANDARDIZE subcommands have no effect on expected values, which are always standardized.
• NOSTANDARDIZE is generally used with an APPLY subcommand to turn off a previous STANDARDIZE specification.

Example

PPLOT VARIABLES = VARX
  /STANDARDIZE.

• This example produces two q-q normal-probability plots of VARX with standardized observed values.