RE: Re: 2D interpolation

*To*: mathgroup at smc.vnet.net*Subject*: [mg72952] RE: [mg72924] Re: 2D interpolation*From*: "Jouvenot, Fabrice" <F.Jouvenot at liverpool.ac.uk>*Date*: Fri, 26 Jan 2007 06:54:33 -0500 (EST)*References*: <200701251211.HAA21017@smc.vnet.net>

Thanks all for your different answers. As I still cannot do what I want to, I finaly explain you everythings because my first exemple wasn't a representative one ;) So I have a function f[x,y] (0 < f <1 increasing and continuous) It is a complicate function where y is the integral min limit. Whatever, what I want is to have a fat answer to the question, for a given f[x,y] and x, what is the y ? (my function is a continuous and increasing function, so there is only one answer to that question). So what I want to do is to have a loop on x (between minx and maxx) and on y (between miny and maxX !!!) to have a list of points. The space between 2 x is linear in Log[x], and between 2 y is linear in Log[y]. So having a list of points arranged this way : {x, f[x,y], y}, I wanted to interpolate that to have the answer to my prob. Now you know everythings, if any one can help I'll be glad. If I read the help for Interpolation[data] it is written that could work with multidemensional data {xi, yi, ... fi}. But I can't find A way to make it work... I cannot use ListInterpolation because I need an aranged array. In fact I have an arrange array in x,y but so I don't know to inverse my function and have y in function of x,f[x,y]... Someone proposed me to use http://www.imtek.uni-freiburg.de/simulation/mathematica/IMSweb/imsTOC/Di fferential%20Equation%20Systems/Utilities/InterpolationDocu.html It seems to do what I want, but... First it means every people I worked with will have to instal it, and second I tried to use it, but I failed (ok I am certainly not very good). You know everythings, Thanks, Fabrice.

**References**:**Re: 2D interpolation***From:*Bill Rowe <readnewsciv@sbcglobal.net>