effects function in R
There is a function in R called effects that returns the following:
"For a linear model, the effects are the uncorrelated single-degree-of-freedom values obtained by projecting the data onto the successive orthogonal subspaces generated by the QR decomposition during the fitting process. The first r (the rank of the model) are associated with coefficients and the remainder span the space of residuals (but are not associated with particular residuals)."
Could someone explain what this means in simpler terms?