The following error estimate shows that linear interpolation is not very precise.
Thus that last column was used for linear interpolation.
The values assigned to the models are calculated through linear interpolation between the two end points.
Colors are calculated by linear interpolation based on distance from the center.
Note that the above has the form of a linear interpolation.
In cases where speed is a major concern, linear interpolation may be a better choice.
The linear interpolation in such cases will produce a plausible single heptagon.
Where the density falls between two consecutive numbers in the table the strength will be determined by linear interpolation.
Under this assumption, is a linear interpolation between and .
Where little motion is detected, the converter can use linear interpolation.