search for: approxiamte

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2007 Oct 09
2
AlgDesign--exact and approximate design
Hi I am trying to generate a design using Algdesign and came across terms of "exact design" and "approxiamte theory design", I did not find a reference to explain what they are, could some one shed some light about this on me? Another question is, I want to measure the main effects and at least two interactions, variables are factors, how do I ensure this in formula, ~.+v1:v2 +v3:v4 ? Thank...