Nested Effects: WITHIN Keyword (MANOVA: Univariate command)

Use the WITHIN keyword (alias W) to nest the effects of one factor within the effects of another factor or an interaction term.

Example

MANOVA YIELD BY SEED(1,4) FERT(1,3) PLOT (1,4)
  /DESIGN = FERT WITHIN SEED BY PLOT.

• The three factors in this example are type of seed (SEED), type of fertilizer (FERT), and location of plots (PLOT).
• The DESIGN subcommand nests the effects of FERT within the interaction term of SEED by PLOT. The levels of FERT are considered distinct for each combination of levels of SEED and PLOT.