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function plottu
clc;
B=xlsread('E:\CT.xls','sheet1')
fun=inline('a(1)*exp(-b(1)*B(i,1))+a(2)*exp(-b(2)*B(i,1))+a(3)*exp(-b(3)*B(i,1))+y(0)','a','b','y(0)','x');
a(0)=[10,10,10];
b(0)=[30,30,30];
y(0)=36;
[x,resnorm]=lsqcurvefit(fun,a(1),b(1),y(1),B(i,1),B(i,2));
end

Originally posted by ÐűËÄÏɽ at 2011-01-11 22:28:03:
ÄãµÄy(0)ΪʲôÊÇ36ÄØ£¿

Originally posted by ÐűËÄÏɽ at 2011-01-11 22:35:15:
ÄãÄǸöB(i,1)ÊÇɶ¶«Î÷£¿ÊDz»ÊÇÏë˵B(:,1)°¡£¿

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y(i)=a1*exp(-b1*x(i))+a2*exp(-b2*x(i))+a3*exp(-b3*x(i))+y(0)

Originally posted by ÐűËÄÏɽ at 2011-01-11 22:35:15:
ÄãÄǸöB(i,1)ÊÇɶ¶«Î÷£¿ÊDz»ÊÇÏë˵B(:,1)°¡£¿

ÄãµÄº¯ÊýÊDz»ÊÇÓ¦¸ÃÕâÑù°¡£¿
y(i)=a1*exp(-b1*x(i))+a2*exp(-b2*x(i))+a3*exp(-b3*x(i))+y(0)

Originally posted by zyj8119 at 2011-01-11 22:46:51:

ÎļþµÄµÚÒ»ÁÐÊý¾Ý¡£

Originally posted by ÐűËÄÏɽ at 2011-01-11 23:01:29:


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Originally posted by ÐűËÄÏɽ at 2011-01-11 23:00:46:
% zyj_main.m
clear;clc;
B=xlsread('CT.xls','sheet1');
xdata=B(:,2);
ydata=B(:,3);
a=[10,10,10];
b=[30,30,30];
y0=36;
x=lsqcurvefit(@zyj_fun1,[a,b,y0],xdata,ydata);


-------------------- ...

Originally posted by ÐűËÄÏɽ at 2011-01-13 02:45:53:
ÎÒ»¹ÕæÊÇÕâôдµÄ³ÌÐò

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Originally posted by zyj8119 at 2011-01-13 17:08:13:

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