Get current values of tunable-surface coefficients

extracts the
current value of a tunable surface. `Kco`

= getData(`K`

)`K`

is a
`tunableSurface`

object that represents the parametric gain
surface:

$$K\left(n\left(\sigma \right)\right)=\gamma \left[{K}_{0}+{K}_{1}{F}_{1}\left(n\left(\sigma \right)\right)+\dots +{K}_{M}{F}_{M}\left(n\left(\sigma \right)\right)\right],$$

where:

*σ*is a vector of scheduling variables.*n*(*σ*) is a normalization function (see the`Normalization`

property of`tunableSurface`

).*γ*is a scaling factor (see the`Normalization`

property of`tunableSurface`

).*F*_{1},...,*F*are basis functions._{M}*K*_{0},...,*K*are tunable coefficients._{M}

`getData`

evaluates `K`

at the current
values of the coefficients
*K*_{0},...,*K _{M}*.