What is the difference between delaunay.m and TriScatteredInterp.m

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Matlab2010 2013-1-28

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https://ww2.mathworks.cn/matlabcentral/answers/60109-what-is-the-difference-between-delaunay-m-and-triscatteredinterp-m

I have scattered data in 2D/3D. I wish to transform it onto a regular grid.

Does TriScatteredInterp use delaunay triangulation? or some other method of triangulation (eg http://en.wikipedia.org/wiki/Minimum-weight_triangulation)?

thank you

http://www.mathworks.co.uk/help/matlab/ref/delaunay.html

http://www.mathworks.co.uk/help/matlab/ref/triscatteredinterp.html

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Answer 1

Shashank Prasanna 2013-1-28

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https://ww2.mathworks.cn/matlabcentral/answers/60109-what-is-the-difference-between-delaunay-m-and-triscatteredinterp-m#answer_72654

TriScatteredInterp indeed uses Delaunay triangulation. The reason they are different in MATLAB is because TriScatteredInterp provides a framework to use the triangulation to perform interpolation. Delaunay on the other hand just provides the triangulation.

You can see under the "definition" section of TriScatteredInterp :

http://www.mathworks.com/help/matlab/ref/triscatteredinterp.html