functional form of graphical output

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Author Message   jayanta mukherjee (neo) New member Username: neo Post Number: 1 Registered: 05-2005 Posted on Sunday, May 08, 2005 - 02:52 pm:    Hi! Is it possible to obtain the fuctional form of an elevation plot in FlexPDE 4. Plese help.   Robert G. Nelson (rgnelson) Moderator Username: rgnelson Post Number: 355 Registered: 06-2003 Posted on Sunday, May 08, 2005 - 05:02 pm:    FlexPDE does not have a built-in facility for finding analytic fits to arbitrary data. You could export the data and use an external data-fitting program to do it. Or, you could explicitly form the coefficients of an orthogonal-function expansion by integrating the products of your data with the various orders of your chosen functions. See a textbook on expansion by orthogonal functions.   jayanta mukherjee (neo) New member Username: neo Post Number: 2 Registered: 05-2005 Posted on Monday, May 09, 2005 - 06:13 am:    thanks, please tell me if it is possible to generate an ASCII out put for an elevation plot. then it will be possible for me to get the functional form of the curve I want using another graph processing s/w. Thanks in advance