PLOT Subcommand (PPLOT command)

PLOT specifies whether to produce a plot of observed values versus expected values, a plot of observed values versus deviations from expected values, or both. The plots shown in TYPE Subcommand (PPLOT command) are nondetrended plots. The figure below shows a detrended q-q plot.

BOTH. Display both detrended and nondetrended normal plots. This is the default.

NORMAL. Display nondetrended normal plots. The observed values are plotted against the expected values.

DETRENDED. Display detrended plots. The observed values are plotted against the deviations from the expected values.

  • If you specify PLOT more than once, only the last specification is executed.
  • Deviations are calculated by subtracting the expected value from the observed value.
  • In low resolution, a dash is used in a detrended plot to indicate where the deviation from the expected is 0.
Figure 1. Detrended normal q-q plot of household income
Detrended normal q-q plot of household income