www.pudn.com > geometric.rar > paratran.m, change:2004-08-13,size:2239b

function y2=paratran(x,y,x1,y1,x2)  % y2=paratran(x,y,x1,y1,x2) % % PARATRAN does parallel transport of a point (x1,y1) to the x coordinate % x2 by moving parallel to the piecewise linear curve {x,y} % If x2 lies outside the bounds of (x,y) then the curve is extended as % needed by simple constant extrapolation of the endpoints. % % G.F. Margrave January 1994 % % NOTE: It is illegal for you to use this software for a purpose other % than non-profit education or research UNLESS you are employed by a CREWES % Project sponsor. By using this software, you are agreeing to the terms % detailed in this software's Matlab source file.   % BEGIN TERMS OF USE LICENSE % % This SOFTWARE is maintained by the CREWES Project at the Department % of Geology and Geophysics of the University of Calgary, Calgary, % Alberta, Canada.  The copyright and ownership is jointly held by  % its author (identified above) and the CREWES Project.  The CREWES  % project may be contacted via email at:  crewesinfo@crewes.org %  % The term 'SOFTWARE' refers to the Matlab source code, translations to % any other computer language, or object code % % Terms of use of this SOFTWARE % % 1) Use of this SOFTWARE by any for-profit commercial organization is %    expressly forbidden unless said organization is a CREWES Project %    Sponsor. % % 2) A CREWES Project sponsor may use this SOFTWARE under the terms of the  %    CREWES Project Sponsorship agreement. % % 3) A student or employee of a non-profit educational institution may  %    use this SOFTWARE subject to the following terms and conditions: %    - this SOFTWARE is for teaching or research purposes only. %    - this SOFTWARE may be distributed to other students or researchers  %      provided that these license terms are included. %    - reselling the SOFTWARE, or including it or any portion of it, in any %      software that will be resold is expressly forbidden. %    - transfering the SOFTWARE in any form to a commercial firm or any  %      other for-profit organization is expressly forbidden. % % END TERMS OF USE LICENSE   	y1p=ycurve(x,y,x1);  y2p=ycurve(x,y,x2);  	if(length(y1p)>1 | length(y2p)>1 ) 		error('parallel transport fails if curve is multivalued'); end  	y2=y2p+y1-y1p;