function?[zgridxgridygrid]?=?gridfit（xyzxnodesynodesvarargin）
%?gridfit:?estimates?a?surface?on?a?2d?grid?based?on?scattered?data
%??????????Replicates?are?allowed.?All?methods?extrapolate?to?the?grid
%??????????boundaries.?Gridfit?uses?a?modified?ridge?estimator?to
%??????????generate?the?surface?where?the?bias?is?toward?smoothness.
%
%??????????Gridfit?is?not?an?interpolant.?Its?goal?is?a?smooth?surface
%??????????that?approximates?your?data?but?allows?you?to?control?the
%??????????amount?of?smoothing.
%
%?usage?#1:?zgrid?=?gridfit（xyzxnodesynodes）;
%?usage?#2:?[zgridxgridygrid]?=?gridfit（xyzxnodesynodes）;
%?usage?#3:?zgrid?=?gridfit（xyzxnodesynodespropvalpropval...）;
%
%?Arguments:?（input）
%??xyz?-?vectors?of?equal?lengths?containing?arbitrary?scattered?data
%??????????The?only?constraint?on?x?and?y?is?they?cannot?ALL?fall?on?a
%??????????single?line?in?the?x-y?plane.?Replicate?points?will?be?treated
%??????????in?a?least?squares?sense.
%
%??????????ANY?points?containing?a?NaN?are?ignored?in?the?estimation
%
%??xnodes?-?vector?defining?the?nodes?in?the?grid?in?the?independent
%??????????variable?（x）.?xnodes?need?not?be?equally?spaced.?xnodes
%??????????must?completely?span?the?data.?If?they?do?not?then?the
%??????????‘extend‘?property?is?applied?adjusting?the?first?and?last
%??????????nodes?to?be?extended?as?necessary.?See?below?for?a?complete
%??????????description?of?the?‘extend‘?property.
%
%??????????If?xnodes?is?a?scalar?integer?then?it?specifies?the?number
%??????????of?equally?spaced?nodes?between?the?min?and?max?of?the?data.
%
%??ynodes?-?vector?defining?the?nodes?in?the?grid?in?the?independent
%??????????variable?（y）.?ynodes?need?not?be?equally?spaced.
%
%??????????If?ynodes?is?a?scalar?integer?then?it?specifies?the?number
%??????????of?equally?spaced?nodes?between?the?min?and?max?of?the?data.
%
%??????????Also?see?the?extend?property.
%
%??Additional?arguments?follow?in?the?form?of?property/value?pairs.
%??Valid?properties?are:
%????‘smoothness‘?‘interp‘?‘regularizer‘?‘solver‘?‘maxiter‘
%????‘extend‘?‘tilesize‘?‘overlap‘
%
%??Any?UNAMBIGUOUS?shortening?（even?down?to?a?single?letter）?is
%??valid?for?property?names.?All?properties?have?default?values
%??chosen?（I?hope）?to?give?a?reasonable?result?out?of?the?box.
%
%???‘smoothness‘?-?scalar?-?determines?the?eventual?smoothness?of?the
%??????????estimated?surface.?A?larger?value?here?means?the?surface
%??????????will?be?smoother.?Smoothness?must?be?a?non-negative?real
%??????????number.
%
%??????????Note:?the?problem?is?normalized?in?advance?so?that?a
%??????????smoothness?of?1?MAY?generate?reasonable?results.?If?you
%??????????find?the?result?is?too?smooth?then?use?a?smaller?value
%??????????for?this?parameter.?Likewise?bumpy?surfaces?suggest?use
%??????????of?a?larger?value.?（Sometimes?use?of?an?iterative?solver
%??????????with?too?small?a?limit?on?the?maximum?number?of?iterations
%??????????will?result?in?non-convergence.）
%
%??????????DEF

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????6148??2006-08-17?14:17??quxiannihe\.DS_Store

?????文件??????43153??1994-07-12?12:38??quxiannihe\bluff_data.mat

?????文件???????6148??2006-08-22?11:45??quxiannihe\demo\.DS_Store

?????文件???????3526??2006-08-22?11:36??quxiannihe\demo\gridfit_demo.m

?????文件??????11998??2006-08-22?11:44??quxiannihe\demo\html\gridfit_demo.html

?????文件???????5820??2006-08-22?11:44??quxiannihe\demo\html\gridfit_demo.png

?????文件???????9636??2006-08-22?11:38??quxiannihe\demo\html\gridfit_demo_01.png

?????文件?????106358??2006-08-22?11:38??quxiannihe\demo\html\gridfit_demo_02.png

?????文件??????11720??2006-08-22?11:38??quxiannihe\demo\html\gridfit_demo_03.png

?????文件?????116439??2006-08-22?11:38??quxiannihe\demo\html\gridfit_demo_04.png

?????文件?????106454??2006-08-22?11:38??quxiannihe\demo\html\gridfit_demo_05.png

?????文件?????127375??2006-08-22?11:38??quxiannihe\demo\html\gridfit_demo_06.png

?????文件?????106871??2006-08-22?11:38??quxiannihe\demo\html\gridfit_demo_07.png

?????文件??????56282??2006-08-22?11:38??quxiannihe\demo\html\gridfit_demo_08.png

?????文件??????52377??2006-08-22?11:38??quxiannihe\demo\html\gridfit_demo_09.png

?????文件??????70654??2006-08-22?11:44??quxiannihe\demo\html\gridfit_demo_10.png

?????文件???????9443??2006-08-22?10:34??quxiannihe\doc\Understanding_gridfit.rtf

?????文件??????33939??2006-08-06?09:34??quxiannihe\gridfit.m

?????文件??????44689??2005-11-11?07:34??quxiannihe\ravine.jpg

?????文件??????????0??2012-11-04?22:03??quxiannihe\readme.txt

?????文件???????6148??2006-08-22?11:36??quxiannihe\test\.DS_Store

?????文件???????5404??2006-08-22?11:36??quxiannihe\test\test_main.m

?????目錄??????????0??2007-07-09?11:32??quxiannihe\demo\html

?????目錄??????????0??2007-07-09?11:32??quxiannihe\demo

?????目錄??????????0??2007-11-02?13:48??quxiannihe\doc

?????目錄??????????0??2007-07-09?11:32??quxiannihe\test

?????目錄??????????0??2012-11-04?22:03??quxiannihe

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???????????????940582????????????????????27



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