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*Subject*: extrapolation of surface*From*: Alexander Rauscher <e9121161(at)stud4.tuwien.ac.at>*Date*: Wed, 1 Aug 2001 17:46:00 +0200*Newsgroups*: comp.lang.idl-pvwave*Organization*: Vienna University of Technology, Austria*Xref*: news.doit.wisc.edu comp.lang.idl-pvwave:25945

hi everybody, i have a function f(x,y) which is f(x,y) != 0 on a more or less circular region which lies within an e.g. 128x128 array and 0 outside this region. now i want to extrapolate this function (over a range of e.g 10 pixles) into the region outside this circular region without the result being influenced by all the f(x,y)=0. sfit also takes into account where f(x,y)=0, which makes the fitted surface fit(x,y) decrease towards the edge of my array which is not what i want. (knowing from the shape of the original f(x,y) that it should increase...) anyone an idea what to do? thanks a lot in advance

**Follow-Ups**:**Re: extrapolation of surface***From:*Dick Jackson

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