Flat
Subtype of Extrap MethodThe reference quantity is extrapolated in flat fashion.
Formally, given a set of independent variable values x₁, x₂, ..., xₙ in increasing order, for which the respective reference quantity values v₁, v₂, ..., vₙ are known then the value v corresponding to some x lying outside the range spanned by x₁, x₂, ..., xₙ is given by
v = v₁ if x < x₁
and
v = vₙ if x > xₙ