MATLAB: Error “Integrand output size does not match the input size.” in implementing double integration. Kindly guide me in eliminating the error.

Question

CODE:

a=0.15

d=sqrt(a.^2+a.^2)

M=@(a1,a2)(((((-(sqrt(a1.^2+a2.^2+d)).*a1)-((sqrt(a1.^2+a2.^2+d)).*a2)-(a1.^2)-(a2.^2)).*((sqrt(a1.^2+a2.^2+d))-a1).*((sqrt(a1.^2+a2.^2+d))-a2))+((-(sqrt(a1.^2+a2.^2+d)).*a1+(sqrt(a1.^2+a2.^2+d)).*a2+a1.^2+a2.^2).*((sqrt(a1.^2+a2.^2+d))+a1).*((sqrt(a1.^2+a2.^2+d))-a2))+(((sqrt(a1.^2+a2.^2+d)).*a1+(sqrt(a1.^2+a2.^2+d)).*a2-a1.^2-a2.^2).*((sqrt(a1.^2+a2.^2+d))+a1).*((sqrt(a1.^2+a2.^2+d))+a2))+(((sqrt(a1.^2+a2.^2+d)).*a1-(sqrt(a1.^2+a2.^2+d)).*a2+a1.^2+a2.^2).*((sqrt(a1.^2+a2.^2+d))-a1).*((sqrt(a1.^2+a2.^2+d))+a2)))/((sqrt(a1.^2+a2.^2+d)).*((sqrt(a1.^2+a2.^2+d))+a1).*((sqrt(a1.^2+a2.^2+d))+a2).*((sqrt(a1.^2+a2.^2+d))-a1).*((sqrt(a1.^2+a2.^2+d))-a2)));

Mpq= integral2(M,-0.15,0.15,-0.15,0.15)

ERROR:

Error using integral2Calc>integral2t/tensor (line 241)

Integrand output size does not match the input size.

Error in integral2Calc>integral2t (line 55)

[Qsub,esub] = tensor(thetaL,thetaR,phiB,phiT);

Error in integral2Calc (line 9)

[q,errbnd] = integral2t(fun,xmin,xmax,ymin,ymax,optionstruct);

Error in integral2 (line 106)

Q = integral2Calc(fun,xmin,xmax,yminfun,ymaxfun,opstruct);

Error in Mtest3 (line 13)

Mpq= integral2(M,-0.15,0.15,-0.15,0.15)

Answer 1

Use ./ instead of / in your function definition.