Figure 9: The interpolated plot as visualized by 2D Delaunay
triangulation method.
The returned interpolated values \(z_{i}\) based on test point
(\(x_{q},y_{q}\)) are plotted in Figure 10. However, 2D interpolation
method does not extrapolate but fill the values which are not within the
input area with ’nan’ values by default, illustrated in Fig. 10 (a) as
the area in white color. As can be seen in Fig. 10(b), these ‘nan’
values can be replaced by numeric ‘1’, illustrated as the area in blue
color.