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redundant zeros in ccdesign matlab

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9times6
9times6 2022-5-31
回答： Walter Roberson 2022-5-31
I am trying to obtain design of experiment using the central composite design scheme (ccdesign). The resulting matrix has many rows which are all zeros. Why does this happen? Can I ignore these redundant rows?
Ex. X = ccdesign(4) results in X(36x4) matrix. However row 25 onwards, it is all zeros.

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Walter Roberson
Walter Roberson 2022-5-31
blocksize=8 or less removes the zeros for design 4

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