www.pudn.com > geometric.rar > distcum.m, change:2004-08-13,size:2678b

function s=distcum(x,y) % s=distcum(x,y) % s=distcum(x) % % If the first form is used, x and y represent the 2-D coordinates of a set of % points. If the second form is used, x represents an incremental distance % vector computed from the point coordinates by distinc. The return value, s, % is the cumulative distance for the set of points. That is, s(j) represents % the distance measured along the point set from the jth point to the first % point. % See also distpoint and distreach % % x = vector containing the incremental distances as computed by distinc % % s = cumulative distance vector containing the distance between each point % and the first point. % Note: length(s) == length(x). s(1) == 0, s(2) == ( distance from % point 2 to point 1), s(j) = ( distance from point j to point 1 ) % % by G.F. Margrave, March 1993 % % 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 % if nargin > 1 d = distinc(x,y); else d=x; end s=zeros(size(d)); for j=2:length(d) s(j) = s(j-1)+d(j); end