In desperate need for help. I have a set of data for the upper surface of an airfoil. I am trying to fit a polynomial to this set so that I can evaluate the second derivative. The current problem is that basic fitting does not produce great accuracy at the end. What I am trying desperately is to prescribe the second derivative at the left end so that this equals -0.001. I have tried csape(x,y,"second") and tried to place -0.001 everywhere but without much success. I keep getting very strange shapes or error saying that the matrices being concatenated is inconsistent.
What I am doing wrong?
Thanks everybody :(