Scale factor of components in the density, specified as a positive scalar, or an
1-by-N vector of positive scalars, where N is
the number of components in the density. If the scale factor is specified as a scalar,
then the weight of each component is multiplied by this scalar. If the scale factor is
specified as a vector, then the weight of each component is multiplied by the
corresponding element in the vector.
Example: [0.9 1.1 0.8]
Data Types: single | double