Displaying 1 result from an estimated 1 matches for "tp25136335p25156303".
2009 Aug 25
1
Problem with correct usage of formula environment
Dear all,
I am working on a function formula.design that should automatically generate
reasonable lm formulae for a number of different designs. All works well as
long as all variables used are columns of the design data frame. For one
function, I would like to incorporate a dummy variable for center points
that is not a column of the design. Without this function, it would work
like this (at