function??[zor0p]?=?detrend2（xyzi）
%?DETREND2?Removing?mean?and?slope?in?2-d?set.
%	[ZOR0P]?=?DETREND2（XYZI）?calculates
%	and?removes?mean?and?slope?of?the?dataset
%	with?coordinates?X?Y?Z.
%	Returns?“detrended“?value?ZO?so?that
%	ZI?=?P（1）+（X-R0（1））*P（2）+（Y-R0（2））*P（3）+ZO.

%??Copyright?（c）?Kirill?K.?Pankratov
%	kirill@plume.mit.edu
%	05/20/95	

?%?Handle?input?......................
if?nargin==0?help?detrend2?return?end
if?nargin<3
??error（‘??Not?enough?input?arguments‘）
end

?%?Make?all?coordinates?column?vectors
sz?=?size（zi）;
x?=?x（:）;
y?=?y（:）;
zi?=?zi（:）;

?%?Find?mean?values
r0（1）?=?mean（x）;
r0（2）?=?mean（y）;
z0?=?mean（zi）;

?%?Extract?mean?values
x?=?x-r0（1）;
y?=?y-r0（2）;
zo?=?zi-z0（1）;

?%?Find?slope?p?=?[zmean?dx?dy]
p?=?[x?y]\zo;
p?=?[z0?p‘];

?%?Extract?slope
zo?=?zo-x*p（2）-y*p（3）;
zo?=?reshape（zosz（1）sz（2））;

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

?????文件????1288414??2018-03-21?17:19??GREENtspline\A.pdf

?????文件????????889??2007-04-27?15:19??GREENtspline\detrend2.m

?????文件????????720??2013-01-07?10:04??GREENtspline\Makefile

?????文件???????1854??2014-06-28?17:34??GREENtspline\README.TXT

?????文件???????4092??2014-06-28?17:31??GREENtspline\spline1d.m

?????文件???????7498??2014-06-28?17:31??GREENtspline\spline2d.m

?????文件???????2124??2014-06-28?17:31??GREENtspline\spline2dgrad.m

?????文件???????1834??2014-06-28?17:31??GREENtspline\spline2dgreen.m

?????文件???????2649??2013-01-07?09:59??GREENtspline\spline2d_grad.c

?????文件????????278??2007-04-27?15:19??GREENtspline\spline2d_grad.m

?????文件???????2190??2013-01-07?09:58??GREENtspline\spline2d_green.c

?????文件????????270??2007-04-27?15:19??GREENtspline\spline2d_green.m

?????文件???????2879??2014-06-28?17:31??GREENtspline\spline3d.m

?????文件???????2990??2007-04-27?15:19??GREENtspline\splinec2.m

?????文件???????3139??2007-04-27?15:19??GREENtspline\splinec3.m

?????目錄??????????0??2018-03-21?17:19??GREENtspline

-----------?---------??----------?-----??----

??????????????1321820????????????????????16