search for: educ_sg

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2013 Apr 05
2
model.frame: object is not a matrix
...not a matrix My attempt at a work-around did not help: Browse[2]> x <- model.matrix(formula(myform), as.matrix(p$data)) Error in model.frame.default(object, data, xlev = xlev) (from mice.R#601) : 'data' must be a data.frame, not a matrix or an array Browse[2]> formula(myform) ~educ_sg + ethnic_sg + hiv + J10 + A5 + mar_stat + orientation + Born_US ~ educ_sg + ethnic_sg + hiv + J10 + A5 + mar_stat + orientation + Born_US + (DWPAD_ActAvoid + DWPAD_EducConf + DWPAD_PasAvoid + DWPAD_Support) * ethnic_sg * racGayDiscStress + 0 Notice there are many three-way inte...