color map on correlation for a resolution IV fractional factorial
Sep 19, 2016 1:08 AM(1176 views)
Hello dear All, I run the color map on correlations for a 2 to 6-2 fractional factorial. I would expect the terms A B C D E AB AC AD AE BC BD BE CD CE DE (not considering three-way interactions). I do not understand why AB AC AD and AE are replicated in the map. In other words, I would not expect the red squares parallel to the diagonal ones. Many thanks, Marcello.