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我正在尝试在Matlab中进行四阶嵌套集成。功能如下:Matlab集成错误:Integrand输出大小与输入大小不匹配
second_integral = @(r_dash, phi_dash, r, phi) ((exp(-1i * k * r_dash * cos(phi_dash) * sin(theta)) .* exp(-1i * k * sqrt(r.^2 + r_dash.^2 - 2*(r * r_dash .* cos (phi_dash - phi)))))/(2 .* pi .* sqrt(r.^2 + r_dash.^2 - 2.*(r .* r_dash .* cos (phi_dash - phi)))));
有了这个特殊的例子所述常数:
a_1 = 7e-5;
a_2 = 5e-5;
k = 1;
theta = 0; % can also be 0.5, 1, 1.5
整合正在做的
integrated_second_integral =integral(@(r_dash)integral3(@(phi_dash,r,phi)second_integral(r_dash,phi_dash,r,phi),0,(2*pi),0,a_2,0,(2*pi)),0,a_1,'ArrayValued',true);
当运行集成命令我得到出现以下错误:
Warning: Matrix is close to singular or badly scaled. Results may be inaccurate. RCOND = 2.725290e-19.
> In @(r_dash,phi_dash,r,phi)((exp(-1i*k*r_dash*cos(phi_dash)*sin(theta)).*exp(-1i*k*sqrt(r.^2+r_dash.^2-2*(r*r_dash.*cos(phi_dash-phi)))))/(2.*pi.*sqrt(r.^2+r_dash.^2-2.*(r.*r_dash.*cos(phi_dash-phi)))))
In @(phi_dash,r,phi)second_integral(r_dash,phi_dash,r,phi)
In integral3>@(y,z)FUN(x(1)*ones(size(z)),y,z) at 139
In funfun/private/integral2Calc>integral2t/tensor at 229
In funfun/private/integral2Calc>integral2t at 56
In funfun/private/integral2Calc at 10
In integral3>innerintegral at 138
In funfun/private/integralCalc>iterateScalarValued at 314
In funfun/private/integralCalc>vadapt at 133
In funfun/private/integralCalc at 76
In integral3 at 122
In @(r_dash)integral3(@(phi_dash,r,phi)second_integral(r_dash,phi_dash,r,phi),0,(2*pi),0,a_2,0,(2*pi))
In funfun/private/integralCalc>iterateArrayValued at 157
In funfun/private/integralCalc>vadapt at 131
In funfun/private/integralCalc at 76
In integral at 89
In this_matlab_script at 61
Error using integral2Calc>integral2t/tensor (line 242)
Integrand output size does not match the input size.
Error in integral2Calc>integral2t (line 56)
[Qsub,esub] = tensor(thetaL,thetaR,phiB,phiT);
Error in integral2Calc (line 10)
[q,errbnd] = integral2t(fun,xmin,xmax,ymin,ymax,optionstruct);
Error in integral3/innerintegral (line 138)
Q1 = integral2Calc(...
Error in integralCalc/iterateScalarValued (line 314)
fx = FUN(t);
Error in integralCalc/vadapt (line 133)
[q,errbnd] = iterateScalarValued(u,tinterval,pathlen);
Error in integralCalc (line 76)
[q,errbnd] = vadapt(@AtoBInvTransform,interval);
Error in integral3 (line 122)
Q = integralCalc(@innerintegral,xmin,xmax,integralOptions);
Error in
@(r_dash)integral3(@(phi_dash,r,phi)second_integral(r_dash,phi_dash,r,phi),0,(2*pi),0,a_2,0,(2*pi))
Error in integralCalc/iterateArrayValued (line 157)
fxj = FUN(t(1)).*w(1);
Error in integralCalc/vadapt (line 131)
[q,errbnd] = iterateArrayValued(u,tinterval,pathlen);
Error in integralCalc (line 76)
[q,errbnd] = vadapt(@AtoBInvTransform,interval);
Error in integral (line 89)
Q = integralCalc(fun,a,b,opstruct);
Error in this_matlab_script (line 61)
integrated_second_integral
=integral(@(r_dash)integral3(@(phi_dash,r,phi)second_integral(r_dash,phi_dash,r,phi),0,(2*pi),0,a_2,0,(2*pi)),0,a_1,'ArrayValued',true);
这个错误的来源对我来说是一个完整的谜。有人可以好好阐述一下这里可能发生的事情,以及我能做些什么来补救它?
你在这里引用的“提示”,我是在解释这个意思是说,对于传递给“积分”的函数“FUN(x)”,在积分处理中,方阵用于'x' ? – dbliss 2016-03-23 00:04:51