Displaying 1 result from an estimated 1 matches for "3dd5c4rppt2bjzwj".
2009 Oct 06
1
linear model with coefficient constraints
I would like to perform a regression like the one below:
lm(x ~ 0 + a1 + a2 + a3 + b1 + b2 + b3 + c1 + c2 + c3, data=data)
However, the data has the property that a1+a2+a3 = A, b1+b2+b3 = B, and
c1+c2+c3 = C, where A, B, and C are positive constants. So there are two
extra degrees of freedom, and R handles this by producing NA for two of the
coefficients. Instead, I would prefer to remove the