Smoothing matrix
= Smoothing matrix
{title2=$S$}
A smoothing matrix maps an observation vector linearly to fitted values, $\widehat Y=SY$. Its diagonal entries quantify each observation's direct contribution to its own fitted value.
= Smoothing matrix
{title2=$S$}
A smoothing matrix maps an observation vector linearly to fitted values, $\widehat Y=SY$. Its diagonal entries quantify each observation's direct contribution to its own fitted value.