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;