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April 21, 2010, 12:22	second order interpolation	#1
white heart New Member Join Date: Apr 2010 Posts: 5 Rep Power: 16	Hello guys I have 2D function and want to do second order interpolation, any body knows the formula? Thanks. White heart

April 22, 2010, 08:36		#2
DoHander Senior Member Join Date: Nov 2009 Posts: 411 Rep Power: 19	Try to use a second order 2D polynomial, fit this to your data points and then use least squares to obtain the coefficients, this will work on kind of grids. Or search in a numerical methods book for 2D interpolations (if I remember well there is a Lagrange formula for regular grids). Do

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