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clear all£» clc disp('²åÖµÇóȡƽ»¬ÇúÏߺóµÄÊýÖµ' ) t = [5 10 15 20 30 40 60 80 120] ; A = [29.84 40.01 46.71 53.87 63.32 67.01 67.33 67.54 67.87]; knots = 3; K = 3 ; % Èý´ÎBÑùÌõ sp = spap2(knots,K,t,A); pp = fnder(sp); % ¼ÆËãBÑùÌõº¯ÊýµÄµ¼º¯Êý dAdt = fnval(pp,t); % ¼ÆËãt´¦µÄµ¼º¯ÊýÖµ rAm = dAdt; % »æÖÆÅ¨¶ÈÄâºÏÇúÏß ti = linspace(t(1),t(end),200); Ai = fnval(sp,ti); plot(t,A,'ro',ti,Ai,'b:') hold on t = [5 10 15 20 30 40 60 80 120] ; B = [36.32 48.21 55.81 62.21 69.81 72.39 72.72 72.91 73.92]; knots = 3; K = 3 ; % Èý´ÎBÑùÌõ sp = spap2(knots,K,t,B); pp = fnder(sp); % ¼ÆËãBÑùÌõº¯ÊýµÄµ¼º¯Êý dBdt = fnval(pp,t); % ¼ÆËãt´¦µÄµ¼º¯ÊýÖµ rBm = dBdt; ti = linspace(t(1),t(end),200); Bi = fnval(sp,ti); plot(t,B,'rx',ti,Bi,'b:') hold on t = [5 10 15 20 30 40 60 80 120] ; C = [41.91 55.62 64.13 70.46 77.64 79.80 80.04 80.57 83.92]; knots = 3; K = 3 ; % Èý´ÎBÑùÌõ sp = spap2(knots,K,t,C); pp = fnder(sp); % ¼ÆËãBÑùÌõº¯ÊýµÄµ¼º¯Êý dCdt = fnval(pp,t); % ¼ÆËãt´¦µÄµ¼º¯ÊýÖµ rCm = dCdt; % »æÖÆÅ¨¶ÈÄâºÏÇúÏß ti = linspace(t(1),t(end),200); Ci = fnval(sp,ti); plot(t,C,'rs',ti,Ci,'b:') hold on t = [5 10 15 20 30 40 60 80 120] ; D = [42.16 62.13 72.91 79.87 84.21 85.61 85.84 86.21 86.22]; knots = 3; K = 3 ; % Èý´ÎBÑùÌõ sp = spap2(knots,K,t,D); pp = fnder(sp); % ¼ÆËãBÑùÌõº¯ÊýµÄµ¼º¯Êý dDdt = fnval(pp,t); % ¼ÆËãt´¦µÄµ¼º¯ÊýÖµ rDm = dDdt; % »æÖÆÅ¨¶ÈÄâºÏÇúÏß ti = linspace(t(1),t(end),200); Di = fnval(sp,ti); plot(t,D,'rv',ti,Di,'b:') Xlabel('t') ylabel('X_A') legend(o,'100%',x,'90%',s,'80%',v,'70%') |
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