MATLAB Mathematics - SERC - Index of

2 Polynomials and Interpolation
−47.95
−48
−4000
−48.05
−48.1
−48.15
−4000
−3500
−3000
−2500
−3500
−4000
Latitude
−48.2
−48.25
−48.3
−4000
−2000
−3000
−3500
−1000
−2500
−2000
−1500
−3000
−3500
−48.35
−4000
−4000
−48.4
−48.45
210.8 211 211.2 211.4 211.6 211.8
Longitude
The arguments for meshgrid encompass the largest and smallest x and y
values in the original seamount data. To obtain these values, use min(x),
max(x), min(y), and max(y).
Closest-Point Searches. You can search through the Delaunay triangulation data
with two functions:
• dsearch finds the indices of the (x,y) points in a Delaunay triangulation
closest to the points you specify. This code searches for the point closest to
(211.32, -48.35) in the triangulation of the seamount data.
xi = 211.32; yi = -48.35;
p = dsearch(x,y,tri,xi,yi);
[x(p), y(p)]
ans =
211.3400 -48.3700
• tsearch finds the indices into the delaunay output that specify the enclosing
triangles of the points you specify. This example uses the index of the
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