http://www.mathworks.com/matlabcentral/newsreader/view_thread/152476 Feed for thread: interp2 --> bicubic method mathematics? en-us &copy;1994-2012 by MathWorks, Inc. webmaster@mathworks.com MATLAB Central Newsreader http://blogs.law.harvard.edu/tech/rss 60 http://www.mathworks.com/images/membrane_icon.gif Mon, 16 Jul 2007 10:42:29 -0400 http://www.mathworks.com/matlabcentral/newsreader/view_thread/152476#383115 Thomas Clark Hello,<br> <br> - THE QUESTION ----------------------<br> Does anyone know what mathematical formulation is used by the 'cubic' method of interp2; or whether a different function might be more appropriate?<br> -------------------------------------<br> <br> <br> - PROBLEM BACKGROUND ----------------<br> I'm writing code based on a theory manual that I have. For interest, the purpose is to generate quadrilateral panels over the surface of a propeller blade.<br> <br> I have the surface in a parametric domain, and a grid of data describing x(eta,nu) and y (eta,nu). So, to retrieve the surface I intend to use interp2 with a cubic function.<br> <br> However, I wish to recreate the data in the theory manual as faithfully as possible. The only guide it gives regarding the interpolation method which should be used is that a hermite spline should be used.<br> <br> Clearly, in 1D that is no problem. Being no mathematician, however, I was not aware that a hermite method could be used for 2-D interpolation.<br> -------------------------------------<br> <br> <br> Thanks for any help!<br> <br> Best Regards<br> <br> Tom